High strength Ti alloy material having improved workability and process for producing the same

摘要

Herein disclosed are a high-strength Ti alloy material having improved workability which contains 2-5% Al, 5-12% V and 0.5-8% Mo (the percents being on a weight basis) and which satisfies the relation: 14%≦1.5. times.(V content)+(Mo content)≦21%, with the balance being Ti and incidental impurities, and a process for producing such high - strength Ti alloy material.PPThe process comprises: preparing a Ti alloy ingot having the above specified composition; hot working the ingot at a temperature wihtin the range of 600°-950° C.; subjecting the work to solid solution treatment at a temperature in the range of 700°-800° C.; and age-hardening the work at a temperatrue between 300° and 600° C. The reesulting Ti alloy material is suitable for use in the fabrication of parts of aircraft where high specific strength and heat resistance are required.