The 11th Executor of the Fatui is an hydro character and before unleashing his might on the enemy you will first need to upgrade the character a little. Here is the complete list of the materials needed for Tartaglia.
Complete list of Materials used by Tartaglia in Genshin Impact
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bxakid
If you're looking to upgrade your Tartaglia here is the complete list of the materials you'll have to farm to Ascend the character and his talents.