Alloyed weapons

[Empyreal Dragon]

Hey all, so I'm looking for spells, magic items, psionic powers etc..

Specifically things that will allow a weapon to benefit from multiple magical materials.

I already found metal fang, and the silver weapon spell the latter of which doesnt remove the normal material. I'm trying to specifically find methods of counting as multiple materials at the same time.

Any help would be appreciated.

[Maat Mons]

Gauntlets of Arcane Weaponry, Ring of Adamant Strikes, and the Truesilver weapon ability might be of interest to you.

[Psyren]

PF has Versatile Weapon (https://aonprd.com/SpellDisplay.aspx?ItemName=Versatile%20Weapon), which doesn't actually change the weapon itself but does allow it to beat DR of the appropriate type. Heart of the Metal (https://aonprd.com/SpellDisplay.aspx?ItemName=Heart%20of%20the%20Meta l) is similar, but can also beat adamantine, however it has a costly component.

[MaxiDuRaritry]

A large number of weapons are already composites, although not alloys. A spear, for example, would have metal parts (the head and possibly parts of the haft and butt) and wooden parts (the haft, or possibly one sharpened end instead of having a separate head), although the haft could also be metal.

Fancy weapons would also have inlays made of metal, wood, gems, or other materials, although I don't know of any ways to make those mechanically relevant.

There ARE lots of ways to alter a weapon's material makeup (such as metalline) or to make it count as another material mechanically (such as silversheen, in the DMG). Psionically resonant crystal has the same stats as steel, so asking your DM to allow metalline to turn the weapon to crystal instead of steel would be mainly a flavor thing, although it's mechanically relevant in the case of psionic characters and (possibly) effects like heat metal and shatter.