Abstract: The changes of the microstructure and mechanical properties of TC11 alloy bar after different final forging temperatures and primary annealing temperatures were studied.The results show that the content of primary α phase of TC11 alloy decreases with the increase of the final forging temperature and primary annealing temperature towards phase transformation temperature.The content of primary α phase decreases by 25% maximum when the final forging temperature increases by 20 ℃, the content of primary α phase decreases by 10% maximum with the increase of primary annealing temperature by 10 ℃.The strength of the alloy does not change greatly when the content of equiaxed α phase fluctuates in the range of 30%-60%, which indicates that the small range of final forging temperature and primary annealing temperature do not cause significant changes of properties of the alloy.