一引言钛合金按照其组织结构,一般可以分为三大类型:即α型、α+β型和β型。α型钛合金是由具有效稳定性较好的α-相组成。用热处理方法不能改变这类合金的组织结构,因此这类合金是在退火状态下使用的。而α+β型和β型钛合金对热处理非常敏感,可以通过不同的热处理,获得不同的组织与性能。这两类合金可以通过高温固溶处理,然后淬火或空冷,把β相全部或部分地保留下来。保留下来的β相的数量、在低温时效时β相的分解程度,以及分解产物的性质和分 An introduction Titanium alloys according to their organizational structure, can generally be divided into three types: the α-type, α + β-type and β-type. α-type titanium alloy is composed of α-phase with good stability. The heat treatment method can not change the structure of this type of alloy, so these alloys are used in an annealed condition. The α + β and β titanium alloy is very sensitive to heat treatment, through different heat treatment, to obtain different organizations and properties. These two types of alloys can be treated by high temperature solution treatment, followed by quenching or air cooling, the β phase retained in whole or in part. The amount of beta phase retained, the degree of decomposition of the beta phase at low temperature aging, and the nature and amount of decomposition products