Diablo 4 Tempering involves using Temper Manuals and crafting materials to add specific affixes to Rare and Legendary gear with a degree of randomness. This system debuted in Season Four, and you can use it as soon as you find a Blacksmith. Here's our guide to it.
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Tempering is the process of randomly adding a Temper Manual's stat affix to a gear piece in the Blacksmith during Diablo 4's season four. When you select your gear piece and your Temper Manual, the game will randomly select one of the Manual's affixes and apply it to your gear within its value range.
For example, if you equip a Natural Resistance Temper Manual with Magic rarity on a Helm, the Tempering process will randomly choose one of the five elemental resistance affixes from the Manual to add to your gear, and the final percentage value will be within the Manual's range of 36.5 to 50 percent. So your result might be something like +42 percent Fire Resistance, or it might be +37.5 percent Poison Resistance. Rare and Legendary gear can only receive one Tempering affix, with the exception of Ancestral Legendaries, which can receive two Tempering affixes from different manuals. You cannot temper Common, Magic, or Unique items.
If you don't get a stat affix you want from the Manual, you can re-Temper the item up to its Tempers limit, usually between three and five. Gear with depleted Tempers will keep the last Tempered affix forever.
