For full Desert Titan taming details, get the taming calculator app.
To tame a Desert Titan, you must destroy the corruption on its body. Taming effectiveness will drop if you hurt the Titan, so try to focus on the corruption. Titans come pre-equipped with a Platform Saddle, however, they are piloted from a seperate cockpit. Titans are a 5 day temporary tame.
Pro tip: Don't use explosive weaponry and really bad rexes with no saddles like the devs did. Fab Snipers for taming it with little/no collateral damage, actually decent rexes + imprint + saddles to kill it (Probably not for this flying one tho lmao).
You have to hit the corrupted part of it it will bulge out of it and then if you destroy all them it will be tamed the taming effectiveness depends how much damage you do to the creature more damage lower taming effectiveness lower damage higher taming affectedness that is how you tame the giant desert manta.