Abstract: The tensile properties of TA15 titanium alloy bars were tested.The metallographic structure and tensile properties of the alloy after being stretched at room temperature and high temperature were studied by means of metallographic microscope, scanning electron microscope, and room temperature tensile and high temperature tensile tests.The results show that the original structure of TA15 titanium alloy bar is equiaxed.After annealing, the size of the primary α phase of the alloy decreases, the β_T structure disappears, and there is a uniform distribution of fine secondary α phases.As the annealing temperature increases, the structure becomes a two-state structure, the strength of the alloy at room temperature decreases first and then increases, and the plasticity presents the opposite trend.The strength is highest at 960 ℃, the tensile strength is 1071 MPa, the yield strength is 881 MPa, and the plasticity is highest at 930 ℃, the elongation after fracture is 17.5%, and the reduction of area is 46%.The high temperature tensile strength is highest at 870 ℃, the tensile strength is 258 MPa, the yield strength is 189 MPa, and the plasticity is highest at 960 ℃, and the elongation after fracture is 280%.The fracture morphology at room temperature at different annealing temperatures is roughly the same, and they are all equiaxed dimples.The high temperature tensile fracture also contains a large number of equiaxed dimples, but the dimple size is larger and deeper, and the fracture morphologies of room temperature and high temperature tensile appearances are all ductile fracture characteristics.