“…Liang et al [28] reported that the Ti 51.8 Ni 45 Fe 3.2 alloy comprises a B2 austenite matrix and a Ti 2 Ni precipitate, and in the Ti 51.8 Ni 44 Fe 3.2 Nb 1 alloy with high yield strength, the Ti 2 Ni and β-Nb precipitates occur in the matrix of B2 austenite. In the Ti-rich Ti–Ni–Fe alloys, to obtain a large number of B2 TiNi phases, the heat-treated ingots were at high temperature for a long time, and the samples were cooled rapidly in ice water after heat treatment [18,19,20,21,22,23,24,25,26,27,28]. After heat treatment, some researchers have carried out subsequent high temperature forging, or low-temperature aging treatment, or thermal cycle to further study the relationship between microstructure, phase transformation and mechanical properties [18,19,20,21,22,23,24,25,26,27,28,29].…”