对TC1 1钛合金施行了不同的热处理制度 ,得到 3种组织形态 ,研究了不同的组织形态的高温循环蠕变。结果表明 ,晶间 β组织具有低的循环蠕变速率 ,而随最大应力的增加 ,蠕变速率增加快 ;而等轴组织和片状组织循环蠕变速率较高 ,但随应力的增加 ,蠕变速率增加较慢。分析认为 ,晶界滑移行为对高温循环蠕变有重要影响 Different heat treatment systems were applied to TC1 1 titanium alloy to obtain three kinds of microstructures and study the high temperature cycling creep of different microstructures. The results show that the intergranular β microstructure has a low rate of cyclic creep, and the creep rate increases rapidly with the increase of maximum stress. However, the rate of cyclic creep of equiaxed and lamellar structures is higher. However, as the stress increases, Variable speed increases slowly. The analysis shows that the grain boundary slip behavior has an important effect on high temperature cycling creep