Superalloy

Examples:
* Meteoric metal
* Titanium
* Plasteel
* Mithril
* Adamantium
* Orichalcum

Note that if the properties of the alloy/metal/whatever go into more fantastic things, such as having so many uses it literally makes anything else useless, see phlebotinum tag instead. This superalloy tag is for things that still retain some semblance of realism.

Oftentimes these don't get much notice besides things being mentioned being made out of it almost reverently.