| 摘要 |
A process for working a beta titanium alloy comprises the following steps: a) a first step for elongating, in which the temperature is not higher than a beta transus and a working ratio is 30% or more, b) a subsequent alpha phase precipitation or aging treatment, c) a third step for elongating, in which the temperature is not higher than the aging treatment temperature and a working ratio is 70% or more when combined with that in the first step for elongating, and optionally d) a re-crystallisation treatment, in which the treating temperature is not higher than the beta transus, or e) isothermal working, in which the temperature is the beta transus minus 200 DEG C to the beta transus. <IMAGE>
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