The fastest way to get to the spawn location for the level 450 titan, the Gargantuan Clamper Wurm (Titan):
Portal to the level 451 realm (Dark Mist Forest)
enter Dark Mist Forest (Edge)
go to Caves of Kreth (Level 10)
go to The Virtue Desert. And that is where the titan spawns
After doing a titan hunt I can confirm that the epic does NOT show up in the titan rewards and the TKP reward does not show up in your guild log.
I'm guessing we will get info about it when the first guild secures a titan or has enough TKP to buy one of the epics. Also speculation, the other new quest is level 1400, so I would guess the other new titan is level 1400.