The phase relationship of Ti-Hf-Mn system was studied by diffusion triple and equilibrated alloy methods. The isothermal sections at 1373, 1273 and 1173 K for this system were constructed by means of electron probe microanalysis (EPMA) and X-ray diffraction (XRD) for the first time. No ternary phase was found in the system at all these temperatures. Six, seven and seven three-phase equilibria regions have been determined at 1373, 1273 and 1174 K, respectively. In this ternary system, the intermetallic compounds TiMn₂, HfMn₂ and HfMn exhibit wide solid solution range at those three temperatures. In particular, the solution range of Ti in HfMn phase decreases with the increase of temperature, from 30.5 at% at 1173 K to 26.5 at% at 1373 K. Based on all available experimental data, the Ti-Hf-Mn system was evaluated using the CALPHAD method. The calculation results are in excellent agreement with the experimental data.

采用扩散三重法和平衡合金法研究了Ti-Hf-Mn体系的相关系。首次通过电子探针显微分析（EPMA）和X射线衍射（XRD）构造了该系统的1373、1273和1173 K等温截面。在所有这些温度下，系统中均未发现三元相。分别在1373、1273和1174 K处确定了六个，七个和七个三相平衡区。在该三元体系中，金属间化合物TiMn ₂，HfMn ₂在这三个温度下，HfMn和HfMn表现出宽的固溶范围。特别是，Ti在HfMn相中的固溶范围随温度的升高而减小，从1173 K的30.5 at％到1373 K的26.5 at％。根据所有可用的实验数据，使用以下方法评估了Ti-Hf-Mn体系： CALPHAD方法。计算结果与实验数据吻合良好。