Anodized metals, especially aluminum, have a wide variety of uses, some of which are downright fantastical. NASA
Anodized aluminum is used on spacecraft and satellites. Spacecraft experience huge temperature swings in space, depending on whether they are exposed to sunlight or not. But anodized metals are poor conductors of heat, which reduces the effects of these rapid and drastic changes. NASA also anodizes its handrails a bright gold to help astronauts stand out visually.
More practical uses include building structures, appliances, interior decoration, food preparation equipment, sporting goods, boats, oil rigs, docks, motor vehicle parts, firearm parts, jewelry, and artwork.
In everyday life, you are most likely to encounter anodized aluminum smartphones, multi-tools, flashlights, cookware, cameras, window frames, roofing, pocket knives, and jewelry.
With its excellent durability, low maintenance, excellent corrosion resistance, and easy-to-apply cosmetic features, the uses of anodized metal are countless.