对含镍０２％～０５％（原子百分数，下同）的铸造Ｔｉ４６５Ａｌ２５Ｖ１０Ｃｒ（％）合金进行１１５０℃×１４４ｈ等温热处理，使铸态粗大、不均匀的层片组织分解为均匀、细小、等轴的近γ组织，然后将其重新加热到１３７０℃×（５～１０）ｍｉｎ后冷却，得到层片团等轴、细小、均匀的全层片组织。对镍微合金化简化铸造钛铝合金组织均匀化、细化热处理工艺的作用机理及含镍的钛铝合金细小全层片组织的形成机理作了分析讨论。 The 02% ~ 05% (atomic percent, the same below) of the cast Ti  46  5Al  2 5V  1 0Cr (%) alloy 1150 ℃ × 144h isothermal heat treatment, so that the casting Coarse and inhomogeneous lamellar structure is decomposed into uniform, fine and equiaxed near-γ tissue, and then reheated to 1370 ℃ × (5-10min) and then cooled to obtain the lamellar equiaxed, fine and uniform Full-thickness tissue. The mechanism of homogenizing the microstructure of titanium-aluminum alloy, refining the heat treatment process and the formation mechanism of Ni-containing titanium alloy thin-layer microstructure were analyzed and discussed.