Manganese is widely used in the steel industry as an alloying agent, improving strength, toughness, and wear resistance of steel. It plays a key role in the production of stainless steels and high-strength low-alloy (HSLA) steels used in construction, automotive parts, and pipelines.

It is essential in aluminum alloys, particularly for beverage cans, where it enhances corrosion resistance and strength. Manganese is also used in batteries, especially in lithium-ion and alkaline types, contributing to energy stability and performance.

In chemical manufacturing, manganese compounds serve as catalysts in oxidation reactions and in the production of fertilizers and animal feed supplements to support healthy bone development and metabolic functions in livestock.

It is also found in pigments for ceramics and glass, providing coloration ranging from pink to purple, and helps remove green tint from glass caused by iron impurities.