The Titans are made up of ex-members of the Teen Titans who were originally brought together by Nightwing to investigate the cause of their conflicting memories regarding their collective past. The group was later reformed by the recently returned Wally West to investigate newly discovered alterations to their universe's history.
Following the Dark Crisis, the Justice League decided to disband and reevaluate how they could best serve the world. They asked Nightwing, who had lead the superheroes during the Crisis in their absence, to take over responsibility for protecting the world. Nightwing opened a new Titans Tower in Bludhaven to house a Titans team comprising of himself, Starfire, Raven, Donna Troy, the Flash, Cyborg and Changeling; which would take the League's place as the world's premier superhero team.
Current Incarnation:
The Titans
Former Incarnations:
The Titans (Original Teen Titans)
The Titans (Justice League's Response Team)