对TC1 1钛合金施行了不同的热处理制度 ,得到 6种α、β相分布组织形态 ,研究不同的组织形态的高温低周疲劳。结果表明 ,等轴组织具有最高的疲劳寿命 ,而晶间 β组织的疲劳寿命较低 ,分析认为。高温循环形变时 ,晶界滑移行为对微应变的协调性产生重要影响 Different heat treatment systems were applied to TC1 1 titanium alloy, and six kinds of α, β phase distribution morphologies were obtained, and the high temperature and low cycle fatigue of different microstructures were studied. The results show that the equiaxed tissue has the highest fatigue life, while the intergranular β organization has a low fatigue life, the analysis said. During high temperature cyclic deformation, the grain boundary slip behavior has an important effect on the coordination of micro-strain