Titan Grip

Prerequisites: 19 Strength, Great Weapon Fighting Style, and Great Weapon Master Feat

After years of honing your skills with Two-Handed Weapons, and grueling strength training you, are able wield Two-Handed weapons in a single hand as if it was a "Light" weapon.Versatile and Two-Handed weapons count as being wielded in two hands for the purposes of damage and dice rolls/re-rolls.

This feat does not give you the benefits from the "Dual Wielder" feat, nor does it give you the benefits from the "Two Weapon Fighting Style". You can however use two Two-Handed Weapons, or Versatile weapons as if they were "Light" weapons. Which does let you wield one in each hand and standard "Two Weapon Fighting" rules apply.

Two-Weapon Fighting
When you take the Attack Action and Attack with a light melee weapon that you’re holding in one hand, you can use a Bonus Action to Attack with a different light melee weapon that you’re holding in the other hand. You don’t add your ability modifier to the damage of the bonus Attack, unless that modifier is negative.

If either weapon has the Thrown property, you can throw the weapon, instead of making a melee Attack with it.

Lets you wield Two-Handed and Versatile weapons as if they were "Light" weapons. 
The weapon counts as being wielded with two hands for the purposes of damage and dice rolls/re-rolls when wielded with one hand.