@JeremyECrawford Where do I find more details on the Titan subtype for 5e and the approximate heights of such creatures?

— Jon Forel (@Jon_4L) February 11, 2019

Creature types and subtypes have no rules of their own. They’re tags. Some rules refer to those types and consequently create various interactions in the game.

As for titans, the best source is currently the “Monster Manual.” #DnD https://t.co/4ZOgiDxdpg

— Jeremy Crawford (@JeremyECrawford) February 12, 2019