Yttrium oxide is used as an additive in steel and nonferrous alloys. FeCr alloys typically contain 0.5-4% yttrium, which enhances the oxidation resistance and ductility of these stainless steels. After adding an appropriate amount of yttrium-rich mixed rare earth to MB26 alloy, the comprehensive performance of the alloy has been significantly improved, which can replace some of the medium-strength aluminum alloy to be used in aircraft stress components. A small amount of yttrium-rich rare earth was added to al-zr alloy to improve the conductivity of the alloy. The alloy has been used in most electric wire plants in China. Yttrium is added to copper alloy to improve electrical conductivity and mechanical strength.

Silicon nitride ceramic material containing 6% yttrium and 2% aluminum, which can be used to develop engine parts; The 400-watt neodymium yttrium aluminum garnet laser beam is used to drill, cut and weld large components. It is used for the electron microscope phosphor screen composed of y-al garnet single chip, with high fluorescence brightness, low absorption of scattered light, good resistance to high temperature and mechanical wear. High yttrium structure alloys for aerospace and other applications requiring low density and high melting point; Yttrium-doped SrZrO3 high temperature proton conduction material is of great significance for the production of fuel cell, electrolytic cell and gas sensor requiring high hydrogen solubility. Used for high temperature resistant spraying materials, nuclear reactor fuel diluent, permanent magnet material additives and electronic industry as inspiratory agents.