In Assassin's Creed: Valhalla, Tungsten Ingots are used to upgrade gear in their final tiers. This certain type of Ingot levels weapons and armor from flawless to mythical rarity. By upgrading a weapon or an armor with Tungsten Ingots, the gear will have its upgrade slots increased, furthering the boosts to the gear's stats.
Where To Find Tungsten Ingots
Tungsten Ingots are the most difficult to find resource in the game. Obviously, this is because they make gears extra powerful!
Remember, unlike Nickel Ingots, Tungsten Ingots are not purchasable. Nickel Ingots will appear for sale in some merchants once you discover your first Nickel Ingots. Tungsten Ingots are only to be found, however, and will never be purchasable.
Tungsten Ingots can only be found in the higher-level areas of England like Hamptunscire, Snotinghamschire, Euvicsire, Lincolnscire, and Glowecestreshire. These areas are traversed when you are 160 or greater in power level. If you are just starting the game, or far from the suggested level, complete some quests first since you have no business looking for Tungsten Ingots until then.
If you are within the suggested power level, all you have to do is to head into the mentioned areas and scout out gold markers appearing on your compass. The locations are marked with an ingot icon.