When i first destroyed a titan, the explosion was nice, but not what i was expecting, so i decided to think of my own death animations for the titans:
Ankylon: The ships shield generates and weapons go critical, causing the outer walls to have several explosions (moving towards the center of the ship slowly) then causing the center of the ship to break away, causing the main explosion.
Ragnarov: The ships Rail-gun goes critical, causing the barrel to begin exploding and splitting (several explosions occur across the railgun) thus causing the rockets and then engines to detonate, destroying the ship
Coronata: The anti-matter pool of the ship goes critical, causing anti-matter to be sucked into the ship, which then Detonates, spreading out a large anti-matter cloud.
Eradica: (2 stages) on activations of it's after-death ability, the ships takes a spiritual form, leaving behind a blue form of the ship. Stage 2: (timer of ability ends) the spiritual form begins to dissolve and break away into space
Vorastra: The "Maw" enters a self-destruct state, causing energy to burst from the ship (like it's breaking into pieces) Then causing the ship to start getting sucked into the Maw, then exploding (not a small explosions, as the Maw collapse on it's self).
Kultorask:The ship beings to break away and split into several pieces, then the pieces cause major explosions (as the nano-machines escape and detonate)
That is how i'd like to see a titan be destroyed . .to go out with a bang.