Effects of heat treatment on microstructure of TC6 titanium alloy

The influence of heating temperature of 850, 900, 950 and 1?000?℃ respectively and heat holding time of 3?min, 30, 60 and 120?min respectively on the microstructure of a TC6 titanium alloy was studied through heat treatment experiments. The result shows that heating temperature and heat holding time have great influences on the microstructure of a TC6 titanium alloy. Among others, heating temperature has the main effect on the volume fraction of α phase namely α phase number diminishes gradually with elevating heating temperature, and heat holding time has the main influence on the grain size of the secondary α phase. However, both of them have little effects on the shape of the microstructure of TC6 titanium alloy. Therefore heating temperature and holding time should be controlled strictly for thermal forge shaping of TC6 titanium alloy.