Ripley, despite having his race described as a Titan, looked very much like a human. However, while Titans vaguely had a humanoid body shape, Lex was fairly certain they were not a part of the humanoid racial group universe wide. Lex had read about them since they were a powerful race, and some of their members existed even within the Origin realm.
Titans were essentially an extreme version of what Lex was originally on the path towards becoming. They were nigh indestructible within the same realm, and it was quite common for them to tank attacks from cultivators in higher realms. Their attack power was nothing to scoff at either. But that was more or less the end of what made their race special - as if it wasn't enough. Insane defense and strong offense were their natural racial traits, but they lacked the versatility that the human race had, so they usually just kept honing those two traits, slowly and steadily becoming a race of overpowered beings.