Planet of origin: Khera
Titanthropes are the native lifeforms of planet Khera. Hey were subjugated and then absorbed as second class citizen by the Kherubim when those came to settle on their world after the destruction of their own. They are large, purple-skinned humanoids who are able to increase or decrease their mass. They have large yellow horns growing from their backs. When increasing his size, a Titan will lose intelligence, but gain strength.
Source: Jim Lee, WildC.A.Ts #1 (1992) and later.