Adding rhenium to alloys can significantly improve their performance, especially when used as an additive for tungsten or molybdenum, enhancing the strength of tungsten and molybdenum alloys, overcoming their tendency to embrittle after recrystallization, improving metal formability and weldability, and making tungsten and molybdenum alloys more robust and stable. Adding rhenium to platinum and rhodium alloys can improve wear resistance without reducing corrosion resistance.