为了研究钛作为口腔修复材料的可行性，采用拉伸试验、表面硬度试验及电子探针对Ｇｒ２型纯钛铸造后的性能进行分析．结果表明：铸造后的钝钛抗拉强度和屈服强度增加，延伸率下降，Ｋｎｏｏｐ氏显微硬度从铸钛表面到内部逐渐下降，硬化层厚度约７５μｍ，电子探针显示钛表面有Ｓｉ，Ａｌ，Ｚｒ元素扩散，Ｓｉ层厚约３０μｍ．说明经铸造后的钝钛能满足临床的需要 In order to study the feasibility of titanium as an oral repair material, the tensile properties, surface hardness test and electron probe were used to analyze the properties of Gr2 pure titanium after casting. The results show that the tensile strength and yield strength of dull titanium after casting increase, while the elongation decreases. The hardness of Knoop decreases gradually from the surface of cast titanium to the inside. The thickness of hardened layer is about 75μm. Electron probe shows that Si, Al , Zr element is diffused, and Si layer is about 30 μm thick. Explain after cast blunt titanium to meet the clinical needs