利用电子显微镜研究了ＳｉＣ纤维增强的钛合金基复合材料的显微结构，结果表明，复合材料的增强相为直径１２０μｍ左右并含有１５μｍ钨芯的柱状纤维，β－ＳｉＣ针状枝晶沿径向生长，其（１１１）面垂直于枝晶生长方向并含有大量的层错和微孪晶。纤维与基体结合得很理想，界面非晶保护层在材料复合过程中未受损失。在材料复合过程中，纤维边缘少量的ＳｉＣ枝晶高温分解并经非晶层扩散到基体与Ｔｉ反应而生成ＴｉＣ和Ｔｉ５Ｓｉ３ The microstructure of the SiC fiber reinforced titanium alloy matrix composite was studied by means of electron microscope. The results show that the reinforcing phase of the composite is a columnar fiber with a diameter of about 120μm and a 15μm tungsten core. Growth, the (111) plane perpendicular to the dendrite growth direction and contains a large number of layer faults and micro-twins. The combination of fiber and substrate is very good, the interface of amorphous protective layer in the material composite process without loss. In the process of material composites, a small amount of SiC dendrites at the edge of the fiber are pyrolyzed and diffused into the substrate by Ti matrix to react with Ti to form TiC and Ti5Si3