Can anyone tell me where to find Titannus?

[quasi steeple]

I'm trying to unlock the drone bay but I can't locate Titanus, the only thing I can think of is that maybe I haven't unlocked its area yet.

[clever talon]

Hi there!

In a future update, we'll be making some improvements to the UI when you interact with the locked doors. It will tell you where you can find said Miniboss/Boss.

As for your question, Titannus can spawn in the Ancient/Elder Hive Barrens. He spawns around 24:15