Abstract: TC11 titanium alloy has been treated by four kinds of different techniques of heat treatment.The microstructure of Equiaxed,Binary,Lamellar,‘Solution and aging’ have been obtained.The mechanical properties of the alloy at room temperature have been tested with a MTS static material test system.Effect of different techniques of heat treatment on the microstructure and mechanical properties of TC11 titanium alloy has been studied.The results show that different microstructure can be obtained by using different techniques of heat treatment. In four kinds of different microstructure,there is very obvious difference on the volume fraction of the equiaxed primary α phase and the transformed β phase,as well as morphology of secondary α phase in the transformed β phase.There is very obvious difference in the mechanical properties of the alloy at room temperature.In four kinds of different microstructure,the strength of ‘Solution and aging’ and Binary is higher,but plasticity is poorer;the plasticity of Equiaxed and Lamellar is better,while the strength is lower.