An hour early, the beta signups have begun. Users who follow the link are able to sign up for both the Xbox One and Windows-PC version of the Titanfall beta. After completing the signup, users are told “Thank you for applying to the Titanfall Beta. You will be emailed by EA no later than 11:59 PM PST on Feb 17th if you have been selected to participate.”
While the beta isn’t able to be accessed via the front page, visiting Titanfall.com/beta reveals a “Beta” link on the front page, bringing you to singups.
According to the Beta FAQ, beta signups will go until February 14th, with the beta presumably starting on February 18th.