Abstract: This article mainly studies the effects of different solution cooling methods on the structure and mechanical properties of Ti150 were studied.The Ti150 sample was heat treated by different heat treatment methods, and then the temperature tensile, high temperature tensile, hardness, high microstructure and high temperature creep of the sample were tested and analyzed.The results show that different solution cooling methods have obvious effects on the microstructure and mechanical properties of the material. With the decrease of the cooling rate, the strength of Ti150 gradually decreases. The tensile strength of Ti150 at room temperature reaches 1176MPa when it is cooled by solution water and 1027MPa when it is cooled by air.The plasticity gradually increased, and the tensile elongation at room temperature increased from 8.4% in water cooling to 14.1% in air cooling.In terms of hardness, it not only decreases with the decrease of the solution cooling rate, but also the core hardness of the sample under the same system is significantly lower than the surface hardness.Conclusion The analysis shows that Ti150 has a strong solid solution strengthening effect, the slower the solid solution cooling rate, the more fully the alloying element diffusion, the primary α phase gradually grows, the secondary α phase slat thickens, the dislocation density decreases, so the strength and hardness decrease, and the creep resistance becomes worse.Conversely, the faster the solution cooling rate, the higher the strength and hardness.