以等离子旋转电极球形Ti-45Al-2Cr-2Nb-0.2W预合金粉末为原料,采用等离子电火花烧结工艺在1150到1250℃范围内制备了高致密度和显微组织均匀一致的细晶钛铝基合金.烧结温度为1150℃时可获得均匀组织的α2+γ双态组织,并呈现出烧结温度范围内最高的断裂强度(1026 MPa)和室温延伸率(1.12％)；烧结温度为1250℃时可获得全片层α2/γ组织,烧结体的断裂强度和室温延伸率分别为953MPa和0.92％.双态组织(DP)的断裂模式是等轴γ晶内的穿晶断裂和片层晶团内的晶间断裂；而DP组织则为穿片层断裂、片层间断裂和台阶撕裂3种模式的复合模式.
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