According to NeoGAF, Titanfall beta files have been accessed, and in those, the names of all the 14 maps in the game has been revealed.

  • angel city
  • colony
  • fracture
  • relic
  • airbase
  • boneyard
  • corporate
  • outpost 207
  • lagoon
  • rise
  • smugglers cove
  • overlook
  • nexus
  • o2

Angel City and Fracture are currently playable in the beta; these names have not been confirmed yet.

SOURCE: NeoGAF via @LiamFTWinter