To register for the Titanfall Beta you must subscribe to the Titanfall newsletter.
Please select the platform you would like play on for the Titanfall Beta. Completing this registration does not guarantee access into the Titanfall Beta as seats are limited. If you have been selected you will be emailed directly by EA with instructions on how to access the game no later than 11:59 PM PST on Feb 17th.
Origin Account required for PC Beta.
The Titanfall Beta is coming and this is your chance to play! To register for the Beta, click HERE and follow the easy instructions. If you are selected to participate you will be contacted by EA via email with instructions on how to access the Beta on either XBOX ONE or PC. Access to the closed Beta is limited and is not guaranteed.
Source: XBOX Press Release