通过激光熔化沉积同步输送的Ti-22Al-25Nb合金粉末，在TA15钛合金基板上制备出Ti2AlNb基合金薄壁试样，分析了沉积态和热处理态Ti2AlNb基合金的微观组织、相组成，测试了沿沉积扫描方向热处理态材料在室温25 ℃和高温750 ℃下的拉伸性能。结果表明，激光熔化沉积Ti2AlNb基合金组织致密，沉积态和热处理态均由B2，α2和O相组成，热处理状态下，激光熔化沉积Ti2AlNb基合金室温和750 ℃下抗拉强度分别为1012 MPa和702 MPa，延伸率分别为1.8%和2.2%。

Thin wall samples from Ti2AlNb-based alloy are deposited on TA15 titanium alloy plate by laser melting deposition of coaxially fed Ti-22Al-25Nb metallic powders. The microstructure, phase constitution for as-deposited and heat treated materials are investigated. The tensile properties along longitude direction at room temperature and 750 ℃ high temperature are tested for materials after heat treatment. The results show that laser direct deposited Ti2AlNb-based alloy is full dense. Both as-deposited and heat treated materials are composed of B2, α2 and O phases. For the deposited Ti2AlNb-based alloy after heat treatment, the tensile strength at room temperature and 750 ℃ are 1012 MPa and 702 MPa, with elongations of 1.8% and 2.2%, respectively.