Never Fall
Rare9.8%ObjectiveOptionalAnywhere
Fully construct a titan.
This essentially just means 'build' a Titan. You'll need a Titan foundry for this, and the requisite research in the combat tree - but its not hard in any medium or larger game.
Note your fleet will be limited to one Titan, but it can be heavily upgraded through use.
Keep it with you in battle to grind it up to level 10 for And Who's Stopping Us?