TiNi形状记忆合金用于人体内,长时间金属元素会不可避免地释放出来,Ni元素可能有致癌作用。因此,人们希望采用无Ni的Ti基形状记忆合金。Ti-Nb-Sn合金系的研究表明,该合金系在包括室温在内的较宽的温度范围内具有良好形状记忆效应;在通常温度下比NiTi 合金具有更优异的变形能力; TiNi shape memory alloy used in the human body, a long time the metal elements will inevitably be released, Ni element may have carcinogenic effects. Therefore, it is desirable to use Ni-free Ti-based shape memory alloys. Studies of the Ti-Nb-Sn alloy system show that the alloy has a good shape memory effect over a wide temperature range including room temperature, more excellent deformability than NiTi alloy at normal temperatures,