# Annealing: how to soften metal

> Annealing softens metal with controlled heat so it can keep being worked; how it is done, how to cool it and how to avoid firescale.

- Source: https://www.711grados.com/en/annealing-metal/
- Language: en
- Note: This entry was drafted with the help of AI and is pending review by the author.
- Published: 2026-08-08
- Updated: 2026-08-08
- Translation (es): https://www.711grados.com/es/recocido-del-metal/
- Author: Sandra Sánchez
- Site: 711 Grados (https://www.711grados.com/)

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When metal is worked a lot it hardens and becomes brittle. Annealing restores its ductility by heating it and letting it cool or quenching it in water.

![Steps of the technique: Clean, Heat, Watch the color, Let it cool, Pickle, Rinse](https://www.711grados.com/media/diagrams/recocido-steps.en.svg "Summary of the steps")

## How it is done

1. Clean the piece and heat it evenly with the torch.
2. Watch the color in dim light: a dark cherry red is the usual reference for silver and copper.
3. Remove the flame and let it cool for a moment.
4. Quench in water (for silver and copper) and pickle to remove the oxides.

## When to anneal

Whenever the metal feels hard, springs back or stops responding to the hammer, rolling mill or draw plate. In rolling, anneal between passes.

## Firescale

In sterling silver, the copper in the alloy oxidizes when heated and leaves dark stains under the surface. It is reduced with a protective flux, with a fine-silver surface or by using resistant alloys such as Argentium silver.

## What to watch

Do not anneal more than necessary: overheating can melt the piece. In gold alloys, time and temperature depend on the karat.

## Step by step

1. **Clean.** Remove grease and dirt from the piece.
2. **Heat.** Move the flame in circles, not staying on one spot.
3. **Watch the color.** In silver, a very faint dull red in dim light.
4. **Let it cool.** In air or quenched in water, depending on the metal.
5. **Pickle.** Lower it into the bath to remove oxide.
6. **Rinse.** Rinse and dry before continuing.

## Tools and materials

- [Torch](https://www.711grados.com/en/jewelers-torches/) and firebrick
- Steel or copper tweezers
- [Pickle](https://www.711grados.com/en/pickling-metal/) bath
- A dimly lit corner to see the color

## Common mistakes

- Overheating: the metal melts or forms firescale.
- Heating only one part: it ends up uneven.
- Putting steel tweezers in the pickle bath.
- Quenching in water metals that do not allow it.

## See also

- [Forging and hammering metal](https://www.711grados.com/en/forging-and-hammering/)
- [Rolling and wire drawing: sheet and wire](https://www.711grados.com/en/rolling-and-wire-drawing/)
- [Jewelry alloys: how they are made](https://www.711grados.com/en/jewelry-alloys-how-they-are-made/)
- [Pickling: cleaning oxides after soldering or annealing](https://www.711grados.com/en/pickling-metal/)