This guide will cover everything you need to know about Titan Empowerment.

Purple Stars show a Titan's Empowerment Level.
In the example above, Goros is at:
1★ Empowerment (indicated by the purple star)
4★ Ascension (indicated by the yellow stars)

Empowering a Titan improves their Bound Effect, which increases the Stat boost they provide to your Invokers during battle.
To Empower a Titan, you need to use Titanhearts or duplicates of the same Titan.
There are 2 types of Titanhearts:
Titanhearts
Elder Titanhearts
Both types of Titanhearts can be found by completing Quests, at the Shop, or as reward from various Game Modes.

Depending on a Titan's Rarity, you will need different types or a different number of Titanhearts.
Rare Titans: 1 Titanheart or 1 duplicate Titan
Epic Titans: 2 Titanhearts or 1 duplicate Titan
Legendary Titans: 1 Elder Titanheart or 1 duplicate Titan
Empowerment requirements do not change at higher Empowerment ★.
Note: Any Titans used to Empower another will be permanently lost.

After Empowering a Titan, their Bound Effect will improve.