The research progress on Ti-Ni-Hf high temperature shape memory alloy is reviewed. The fabrication and process method are briefly introduced. Additionally, phase transformation properties, microstructure, oneway and two-way shape memory effect, superelasticity behavior, mechanical properties and microscopic mechanism are focused on. Finally, key topics for further studies are pointed out.%介绍了钛镍铪高温形状记忆合金的研究进展,简述了钛镍铪合金的制备与加工方法,着重阐述了钛镍铪的相变特性、显微组织结构、单程及双程形状记忆效应、超弹性行为、机械特性和相应的微观机理,最后提出了需要进一步研究的问题.
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