This paper presents a review of the characteristics, types, manufacturing processes and performance control of shape memory alloys (SMAs). The current application in non-energy containing unlocking separation device is also reviewed. Basic working principles of SMA and current series of commonly used alloys are summarized. The main preparation processes of SMA are analyzed, especially the current application situation of spray casting, powder metallurgy and additive manufacturing in preparation of SMA materials. The current research status of SMA performance control based on typical processes such as alloying component design, heat treatment and plastic processing is introduced. Moreover, the current application status of SMA in non-energy containing unlocking separation device is discussed. Finally, key issues that need to be urgently addressed in institutional research and SMA material are prospected from a perspective of application and promotion.

shape memory alloys  /  separating attachment  /  preparation process  /  properties optimization