Pure molybdenum has the advantages of high melting point, good thermal conductivity, and small thermal expansion coefficient. Molybdenum alloy is a non-ferrous alloy composed of molybdenum as the matrix and other elements are added. This article mainly introduces Molybdenum single-crystal alloy, Molybdenum rhenium alloy, and Titanium zirconium molybdenum (TZM) alloy. Molybdenum singl-crystal alloy Molybdenum single