The largest moon of Saturn, used as cover by the Enterprise in the 2009 film and home to a colony that had grown estranged from Earth by the 32nd century.
Titan is the largest moon of Saturn in the Sol system. In the film Star Trek (2009), Pavel Chekov suggests dropping out of warp inside its hazy atmosphere so that the Enterprise can approach Earth unseen by Nero's ship, the Narada.
In the Discovery episode People of Earth, set in 3189, Titan has long been home to a human colony. After an accident wrecked part of the settlement about a century earlier, Earth's defence forces fired on the ships sent to ask for help, and the colonists' descendants turned to raiding under a leader called Wen. Michael Burnham and Saru bring the two sides face to face and the feud ends.
Titan is mentioned again in Discovery's fourth season as one of the worlds threatened when the Dark Matter Anomaly approaches the Sol system. Several Starfleet vessels have carried its name.