在常规的水基腐蚀剂不能有效地显示一些近α钛合金的晶界时 ,应用化学沉积法可以真实、完整、清晰地显示它们的晶粒形态 ,并且能充分表现孪晶形貌。实验结果表明 ,两种化学沉积配方显示的金相组织在显微镜下可得到彩色金相图片 ,在黑白摄影的条件下同样可获得满意的效果。 When conventional water-based etchants can not effectively show the grain boundaries of some α-Ti alloys, the chemical deposition method can be used to display their grain morphology truly, completely and clearly, and to fully demonstrate the twin morphology. The experimental results show that the two kinds of chemical deposition shows the microstructure of metallographic microstructure can be obtained under the microscope metallographic pictures, the same conditions can be obtained in black and white photography satisfactory results.