Abstract:The effects of solution and aging at different temperatures on the microstructure and hardness of Ti2041 alloy were studied. The results show that: at the solution temperature of 700℃, the content of primary α phase and the grain size increase gradually, with the increase of holding time; At the solution temperature of 750℃, with the increase of holding time, it can be seen that there are secondary α phases in the microstructure and static recrystallization occurs. The grain size increases gradually; At the solution temperature of 800℃, α′ martensite appears in the microstructure, and the morphology changes from equiaxed to lath. The change of hardness value is also different under different solution temperature. At the solution temperature of 700℃,with the increase of holding time, the hardness value decreases from 301.6HV to 285.2HV;At the solution temperature of 750℃,with the increase of holding time, the hardness value increases first and then decreases. The maximum value is 308.2HV;At the solution temperature of 800℃,with the increase of holding time, the hardness value increases gradually and the maximum value is 331.4HV. After aging treatment, secondary α phase appeared in the microstructure at different aging temperatures. With the increase of aging temperature, the size of secondary α phase decreases. The hardness value increases gradually and the maximum value is 451.75HV.The main strengthening mechanism is the second phase(secondary α phase) dispersion strengthening.