为了研究TiB增强钛基复合材料在高温变形过程中的组织演变和硅化物析出行为,950℃时在应变速率为0.05 s?1,应变分别为0.04、0.40、0.70和1.00的工况下对其进行等温热压缩试验.研究发现:随着应变的增加,初生α相含量降低及其发生的连续动态再结晶和TiB增强相沿垂直压缩轴方向的定向分布导致应力趋于稳定,同时连续动态再结晶导致初生α相的取向差减小,从而削弱基体的织构强度.动态再结晶的机制主要是应变诱导晶界迁移以及TiB增强相诱导晶粒形核.元素扩散促进硅化物的析出,析出的Ti6Si3型硅化物主要分布在TiB及α相的界面上,TiB增强相通过阻碍位错的运动和提供形核质点加速硅化物的析出行为.“,”In order to elucidate the microstructure evolution and silicide precipitation behavior during high-temperature deformation, TiB reinforced titanium matrix composites were subjected to isothermal hot compression at 950 ℃, strain rate of 0.05 s?1 and employing different strains of 0.04, 0.40, 0.70 and 1.00. The results show that with the increase of strain, a decrease in the content, dynamic recrystallization of the α phase and the vertical distribution of TiB along the compression axis lead to stress stability. Meantime, continuous dynamic recrystallization reduces the orientation difference of the primary α phase, which weakens the texture strength of the matrix. The recrystallization mechanisms are strain-induced grain boundary migration and particle stimulated nucleation by TiB. The silicide of Ti6Si3 is mainly distributed at the interface of TiB and α phase. The precipitation of silicide is affected by element diffusion, and TiB whisker accelerates the precipitation behavior of silicide by hindering the movement of dislocations and providing nucleation particles.