Great news coming via Major Nelson blog!! The Titanfall Beta which had been limited to those with codes till now, has been opened to all Xbox One owners, now. It may not appear at the same time for everyone, but ultimately will appear in New Game Demos section of the Games store for all.
Later today, the teams will be opening up the Titanfall Beta to all Xbox One owners. That means no code will be necessary to download and play the beta. We are really excited to get a good test on all of our systems before launch and encourage you to join in.
To download the beta, sign in to your Xbox One and head to the “New Game Demos” section of the Game Store and it will appear there. You can also say “Xbox Bing” then “Show me game demos”.