Abstract:The composition of AgCuTi alloy solder is an essential factor affecting its performance. In this study, AgCuTi solder powder with distinct components was prepared utilizing the melting atomization method. The powder was subjected to oxygen content, melting point, microstructure, as well as hardness of the powder were tested and characterized. On the basis of the quadratic Polynomial regression regression method and interaction relationship in mathematical statistics, the mathematical model of the impact of each element’s content on the melting point of AgCuTi solder was established by JMP software, and the relationship between each element’s content and the melting point was quantitatively described by regression fitting. Furthermore, the research results revealed that Ti content significantly affected the melting point and hardness of AgCuTi active solder powder. On the condition when the Ti content was 2~4.6 wt.%, the melting point of the brazing material increased with the increase of Ti content, and the lowest melting point was about 780℃, and the highest was about 812℃. The hardness of the AgCuTi brazing material also increased with the increase of Ti content, and it increased by 126.03 HV from 122.79 HV to 248.82 HV., representing a gain of 126.03 HV. Moreover, the calculation model in this study has high accuracy and can predict the melting point of AgCuTi alloy brazing materials with various compositions. The research findings provide a reference for the selection and application of Ag-Cu-Ti alloy brazing materials.