中文摘要：

GumMetal特指一类符合某些特定电子状态参数和成分条件的钛合金，具有很多特异的性能，如室温超塑性、低加工硬化率，经历超过90％的冷旋锻后具有高强度、非线性超弹性、低的杨氏模量，以及Invar和Elinvar性能等。自GumMetal问世以来，其特异性能的机理和变形机制便一直存在很大的争议。本文结合作者近几年的研究工作，从合金设计、制备工艺、性能、成分敏感性和塑性变形行为等几个方面，综合评述了该类合金的研究现状。

英文摘要：

Gum Metal stands for a group of multifunctional titanium alloys those satisfy certain special magic electronic parameters and chemical compositions. These alloys exhibit a series of unique properties, such as superplasticity and low work hardening ratio at room temperature, and high strength, nonlinear superelasticity, low elastic modulus, Invar and Elinvar behavior after severe cold deformation. The unique properties and deformation mechanism have been disputed seriously since the alloys were developed. In this paper, by integrating our research work, the progress in research of Gum Metal is reviewed from the aspects of alloy design, preparation process, properties, composition sensitivity and plastic deformation behaviors.