Reliable joints are important for medical device fabrication. NiTi shape memory alloys and stainless steel are two examples. However, welding of these two alloys with fusion welding will result in the formation of intermetallic compounds. Here, two methods are used to study the formation of intermetallic compounds in the NiTi/SS joints. One is to control the melting location through beam offset in laser microwelding and another is to restrict the mixing through interlayer in resistance spot welding. The strength of the joint is evaluated.