According to Tim McCreight in "Complete Metalsmith", to anneal the following metals, you need to heat them to a "dull red and quench as soon as the redness disappears"
- 14k gold
- 10k gold
- red golds
- sterling
- fine silver
- copper
Bronze gets heated to dull red and quenched as soon as the redness disappears.
White gold (nickel based) and brass get heated to bright red and air cooled.
And no, unless you have some kind of seriously modified stove or you're working with a metal not listed above, this can't be done in a kitchen oven. You need a torch or a kiln - we're talking of heating the metal to temperatures of around 1100 degrees or higher!!!
If you're using a metal not listed above, let us know.