采用加中间过渡金属的工艺方法，对钛合金ＴＣ４与不锈钢１Ｃｒ１８Ｎｉ９Ｔｉ扩散焊接头的结合强度进行了试验研究，利用扫描电镜、电子探针仪等对接头进行了微观分析。结果表明，采用纯镍作中间过渡金属虽然有效地防止了钛与铁、碳间的相互扩散和迁移，但在镍与钛之间却形成了金属间化合物薄层，致使接头的最高强度在３８０ＭＰａ左右；采用钒＋铜复合过渡金属彻底地消除了钛合金—不锈钢接头中的金属间化合物和碳化物，接头强度与软质中间层铜的厚度有关，最高强度达５４０ＭＰａ左右． The bonding strength of titanium alloy TC4 and stainless steel 1Cr18Ni9Ti diffusion welding joint was studied by the method of adding intermediate transition metal. The microstructure of the joint was analyzed by SEM, electronic probe and so on. The results show that the use of pure nickel as the intermediate transition metal effectively prevents the mutual diffusion and migration of titanium, iron and carbon. However, an intermetallic compound layer is formed between nickel and titanium, resulting in the highest strength of the joint at 380 MPa ; Vanadium + copper complex transition metal completely eliminates the titanium alloy - stainless steel joints in the intermetallic compounds and carbides, joint strength and thickness of the soft middle layer of copper, the highest strength of about 540MPa.