研究了TC4钛板超塑性变形后室温机械性能的变化。结果表明,在本实验条件下,对性能影响最大的因素是超塑性变形量。当变形量较小(50%)时,机械性能指标较原材料略有增大;变形量超过200%以后,机械性能则低于原材料的指标。超塑性变形后机械性能的变化是比较复杂的,它主要与晶粒粗大、界面相形成、位错、空洞及冷却条件等因素有关。 The mechanical properties of TC4 titanium plate at room temperature after superplastic deformation were studied. The results show that under the experimental conditions, the most influential factor on the performance is the amount of superplastic deformation. When the deformation is small (50%), the mechanical properties of the index slightly higher than the raw material; deformation of more than 200%, the mechanical properties are lower than the raw material index. Mechanical properties after superplastic deformation changes is more complex, it is mainly coarser grain, interface phase formation, dislocations, voids and cooling conditions and other factors.