Titanium Alloy Fatigue & Damage Tolerance Patent Landscape
ATI Properties dominates a highly concentrated field, holding a commanding lead among the top hundred filers in titanium alloy fatigue and damage tolerance. Activity peaked in 2018 and has eased since, though recent-period data are subject to publication lag and the long-term multi-year record still reflects a substantial body of work.
ATI Properties leads a concentrated, maturing field
ATI Properties Inc ranks first among all filers, followed by Nippon Steel Corporation and Titanium Metals Corp in second and third place respectively. The top five filers together account for 38% of the combined total of the hundred largest filers, signalling meaningful concentration at the top of the competitive hierarchy.
The gap between the first-ranked applicant and the rest of the field is steep: ATI Properties’ count is nearly 70% larger than Nippon Steel’s, which itself outpaces the third-ranked Titanium Metals Corp by more than twofold. A second tier of Japanese materials specialists — Kobe Steel, NHK Spring — and aerospace primes — General Electric, Boeing, United Technologies — sits well below that leading pair.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | ATI Properties Inc | 337 | |
| 2 | Nippon Steel Corporation | 198 | |
| 3 | Titanium Metals Corp | 90 | |
| 4 | Kobe Steel Ltd | 71 | |
| 5 | General Electric Co | 56 | |
| 6 | NHK Spring Co. Ltd. | 52 | |
| 7 | The Boeing Company | 51 | |
| 8 | United Technologies Corp | 43 | |
| 9 | Tohoku University | 41 | |
| 10 | NIPPON STEEL & SUMITOMO METAL CORP | 41 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 11 | Daido Steel Co. Ltd. | 38 | |
| 12 | Institute of Metal Research, Chinese Academy of Sciences | 38 | |
| 13 | Sumitomo Metal Industries Ltd | 37 | |
| 14 | VSMPO-AVISMA Corporation | 35 | |
| 15 | Honda Motor Co. Ltd. | 27 | |
| 16 | Northwest Institute for Nonferrous Metal Research | 27 | |
| 17 | Toyota Central R&D Labs Inc | 25 | |
| 18 | Monash University | 24 | |
| 19 | SN DETUDE & DE CONSTR DE MOTEURS DAVIATION (S N E … | 23 | |
| 20 | Howmet Aerospace Inc | 23 |
ATI Properties’ commanding position reflects deep, sustained investment in alloy composition and thermo-mechanical treatment across both aerospace and biomedical applications. Nippon Steel’s second-place standing, concentrated in alloy and non-ferrous treatment classes, underscores the importance of Japanese steelmakers in this otherwise US-heavy field.
Filing counts for 2024–2026 are under-counted due to the 18-to-24-month patent publication lag; the apparent recent dip should not be read as a structural contraction without further monitoring. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Activity peaked in 2018; alloy composition and thermo-mechanical treatment dominate the technology mix
The two charts below show annual filing activity from 2017 onward and the IPC class distribution across the corpus, together revealing both the pace of innovation and the structural emphasis of the field.
Annual filing trend
Filings rose from 116 records in 2017 to a peak of 135 in 2018, then declined progressively to the mid-80s range through 2022–2024. The 2025 and 2026 bars are materially under-counted because of publication lag and should not be treated as indicative of current activity levels.
↗ Hover for values · click a bar to ask EurekaTechnology composition
C22C (Alloys) and C22F (Non-ferrous metal treatment) together account for the two largest branches by a wide margin, reflecting the field’s core focus on alloy formulation and heat/thermo-mechanical processing. B22F (Powder metallurgy), C23C (Coating and surface deposition), B33Y (Additive manufacturing), and C21D (Heat treatment of metals) are each measurably present but at substantially lower levels, indicating active but less mature sub-fields. Biomedical branches — A61L, A61F, A61C — appear consistently, confirming implant and prosthetic applications as a real segment of activity.
↗ Hover for values · click a bar to ask EurekaHighly cited patent families surfaced by the query
Citation-heavy patent families returned by the query. Use this section as citation context, not as a curated list of the most topic-specific patents.
Method of increasing the fatigue life of titanium …
A method of increasing the fatigue life of a metal part of a titanium alloy by subjecting it to the steps of abrasive cleaning and shot peening. (excerpt from the patent abstract)
Open this patent in Eureka →| # | Patent | Citations |
|---|---|---|
| 1 | Titanium alloy self-expanding stent | 830 |
| 2 | Surface hardened biocompatible metallic medical im… | 323 |
| 3 | Surface and near surface hardened medical implants | 212 |
| 4 | Titanium alloy and method for producing the same | 196 |
| 5 | High strength, low modulus, ductile, biopcompatibl… | 167 |
| 6 | Titanium-aluminum-vanadium alloys and products mad… | 143 |
| 7 | Method for treating a vessel with a titanium alloy… | 129 |
| 8 | Method for producing titanium alloy turbine blades… | 122 |
Ranked by total forward citations. Citation counts favour older and broadly cited patent families, and broad or adjacent patents may appear when they match the search scope. Treat this section as citation context, not as a curated list of the most topic-specific patents. Some patent titles may be shown in their original, non-English language where an accurate translation could not be guaranteed.
What the competitive structure means for R&D investment decisions
Four structural observations — lifecycle stage, concentration, collaboration patterns, and geographic spread — frame where incumbents are strong and where entrants may find room.
Field is past its 2018 peak but retains a large active base
The lifecycle evidence places this field in a decline stage, with annual filings easing back from the 2018 peak. On a multi-year basis the corpus of 905 patent families is still substantial, and publication lag means the most recent bars understate true current activity. R&D teams should treat this as a mature, competitive space where incremental alloy and processing claims face a high prior-art bar.
Lifecycle: DeclineTop five control 38% of the leading-hundred filers’ output
ATI Properties, Nippon Steel, Titanium Metals Corp, Kobe Steel, and General Electric together represent 38% of the hundred largest filers’ combined records. This degree of concentration means that core alloy composition (C22C) and thermo-mechanical treatment (C22F) claims are heavily covered by a small group of incumbents. New entrants are most exposed to freedom-to-operate challenges in precisely these dominant branches.
High concentrationNHK Spring–Tohoku University is the most active co-filing pair
The strongest co-applicant link is between NHK Spring Co. Ltd. and Tohoku University (Japan), with 26 jointly filed records — notably more than the next largest pair. Boeing and VSMPO-AVISMA follow with 14 joint records, reflecting the aerospace supply-chain dependency on Russian titanium. Kobe Steel and Mitsubishi Heavy Industries account for 12 joint records, rounding out the dominant collaboration clusters. These pairings suggest that university-industry and OEM-supplier co-development are the primary ecosystem structures in this field.
Ecosystem: supplier + universityUS leads filings; China and Europe are substantial secondary offices
The United States is the lead jurisdiction, followed by China and Europe (EPO). Japan and the WIPO PCT channel are also significant. The breadth across at least five major jurisdictions indicates that incumbents pursue wide geographic coverage, raising the cost of freedom-to-operate clearance for new entrants across all key markets simultaneously.
Multi-jurisdiction coverageGo beyond the landscape: Eureka’s TRIZ Solution agent breaks down an R&D problem and returns patented concept solutions, each with a technical approach and cited patent & literature evidence.
| Applicant | Collaborator | Co-filings |
|---|---|---|
| NHK Spring Co. Ltd. | Tohoku University | 26 |
| The Boeing Company | VSMPO-AVISMA Corporation | 14 |
| Kobe Steel Ltd | Mitsubishi Heavy Industries Ltd | 12 |
| Nippon Steel Corporation | Aisan Industry Co. Ltd. | 5 |
| Nippon Steel Corporation | NIPPON STEEL & SUMITOMO METAL CORP | 5 |
| Nippon Steel Corporation | Toho Titanium Co. Ltd. | 4 |
| The Boeing Company | VSMPO-AVISMA Corporation | 4 |
| Nippon Steel Corporation | Nippon Steel & Sumikin Metal Products Co. Ltd. | 2 |
| Kobe Steel Ltd | Honda Motor Co. Ltd. | 2 |
| Institute of Metal Research, Chinese Academy of Sciences | Baoji Titanium Industry Co. Ltd. | 2 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
ATI Properties leads by a wide margin; Chinese institutions show momentum
The top two applicants share a focus on alloy composition and non-ferrous metal treatment but differ sharply in trajectory, with ATI Properties pulling back from earlier filing rates while the Institute of Metal Research (Chinese Academy of Sciences) grows.
ATI Properties Inc
ATI Properties Inc holds the top position with 337 patent records, concentrated in alloy composition (C22C), non-ferrous metal treatment (C22F), and biomedical sterilisation/implant branches (A61L). Its recent filing rate has declined 58% versus the prior period, consistent with the broader field maturation and a possible shift toward defending existing positions rather than expanding the frontier.
patent records: 337Institute of Metal Research (CAS)
The Institute of Metal Research under the Chinese Academy of Sciences holds 38 patent records and is the only major filer in this corpus showing positive recent momentum, up 20% versus the prior period. Its technical emphasis spans non-ferrous metal treatment (C22F), alloy composition (C22C), and general alloy development, positioning it as a growing public-sector challenger with potential to expand into process and application branches.
patent records: 38| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| ATI Properties Inc | 32 | ▼ -58% |
| Nippon Steel Corporation | 6 | ▼ -87% |
| Titanium Metals Corp | 4 | ▲ new entrant |
| General Electric Co | 7 | ▲ new entrant |
| The Boeing Company | 2 | ▲ new entrant |
| Institute of Metal Research, Chinese Academy of Sciences | 12 | ▲ +20% |
Under-served branches adjacent to the dominant alloy and processing core
Several IPC branches appear in the corpus at notably lower shares relative to the dominant C22C and C22F classes. These represent adjacent areas of technical activity that are less densely covered by the current leading filers.
B33Y · Additive manufacturing (3D printing)
Additive manufacturing accounts for a small share of records relative to the dominant alloy and processing branches. Given the technical relevance of AM to near-net-shape titanium components with tailored microstructures for fatigue resistance, and the growing industrial adoption of metal AM in aerospace, this branch is plausibly under-served. Entry paths exist through process parameter optimisation, post-build heat treatment protocols, and AM-specific damage tolerance qualification methods — areas where the incumbent leaders have limited established positions.
Search this in Eureka →C23C · Coating & surface deposition
Surface coating and deposition methods represent a measurably smaller share of the corpus than core alloy and thermo-mechanical treatment branches. Surface treatments — including diffusion coatings, physical vapour deposition, and laser surface processing — directly affect fatigue crack initiation behaviour, making this technically adjacent to the field’s core concern. The sparse coverage relative to the dominant branches suggests room for differentiated claims linking specific coating architectures to quantified fatigue life improvements.
Search this in Eureka →How leaders differ by technology route
Route coverage across the main technology branches in the current evidence set.
| Player | C22C 14 · Alloys | C22F 1 · Non-ferrous metal treatment | C22C 1 · Alloys | B22F 3 · Powder metallurgy | A61L 27 · Sterilising & disinfecting |
|---|---|---|---|---|---|
| ATI Properties Inc | Strong · 303 | Strong · 281 | Emerging · 11 | Absent | Emerging · 28 |
| Nippon Steel Corporation | Strong · 155 | Strong · 137 | Absent | Emerging · 6 | Absent |
| Titanium Metals Corp | Strong · 86 | Strong · 57 | Emerging · 17 | Absent | Absent |
| Kobe Steel Ltd | Strong · 67 | Strong · 50 | Absent | Absent | Absent |
| NHK Spring Co. Ltd. | Strong · 44 | Strong · 36 | Moderate · 14 | Moderate · 16 | Emerging · 7 |
| Nippon Steel & Sumitomo Metal Corporation | Strong · 51 | Strong · 38 | Absent | Absent | Absent |
| General Electric Co | Strong · 40 | Strong · 40 | Absent | Emerging · 5 | Absent |
Frequently asked questions
The analysis covers 905 patent families in the titanium alloy fatigue and damage tolerance field globally.
ATI Properties Inc is the leading filer with 337 patent records, well ahead of the second-ranked Nippon Steel Corporation at 198 records.
The United States leads all jurisdictions, followed by China and Europe (EPO). Japan and the WIPO PCT channel are also significant filing destinations.
Annual filing volume peaked in 2018 at 135 records and has eased since. The lifecycle evidence places the field in a decline stage on an annual-volume basis, though the most recent years are under-counted due to the 18-to-24-month publication lag and should be interpreted cautiously.
NHK Spring Co. Ltd. and Tohoku University (Japan) are the most active co-filers with 26 jointly filed records. Boeing and VSMPO-AVISMA follow with 14, and Kobe Steel and Mitsubishi Heavy Industries account for 12 joint records.
Additive manufacturing (B33Y), coating and surface deposition (C23C), powder metallurgy (B22F), and heat treatment of metals (C21D) each appear at materially lower shares relative to the dominant C22C and C22F branches, making them worth monitoring as adjacent areas of potential differentiation.
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Disclaimer. This page is generated from Patsnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
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