s）比初生相α（αp）對時效參數(shù)更為敏感。此外，αs相的厚度與時效溫度和時效時間呈正相關(guān)。隨著時效溫度和時效時間的增加，Ti和Al元素在βt相中的偏析明顯，αs相由細針狀轉(zhuǎn)變?yōu)殚L棒狀。當合金在600 ℃時效12 h時，合金表現(xiàn)出較好的綜合力學(xué)性能?？估鞆姸?、屈服強度和伸長率分別為907 MPa、796 MPa和16%，沖擊功為55 J。;In order to understand the influence of the different aging parameters on the microstructure and mechanical properties of Ti-6Al-3Nb-2Zr-Mo (Ti6321) alloy, the microstructures and mechanical properties under different aging parameters (temperatures ranging from 500 °C to 650 °C, 3–24 h) were investigated by optical microscopy (OM), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and mechanical properties tests. The results reveal that the secondary α phase (αs) is more sensitive to the aging parameters than the primary α phase (αp). Moreover, the thickness of αs phase is positively correlated with aging temperature or aging time. As the aging temperature and aging time increase, the segregation of Ti and Al elements in the β transformation phase (βt) becomes obvious, and the αs phase changes from fine needle-like to long rod-like. When the alloy is aged at 600 °C for 12 h, the alloy shows good comprehensive mechanical performance. The tensile strength, yield strength, and elongation are 907 MPa, 796 MPa, and 16%, respectively, and the impact energy is 55 J."/>