Major Nelson has confirmed that Titanfall is now available to all Xbox One owners via the Demos section of the Xbox One Store. The Beta is opening to all Xbox One owners as Microsoft and Respawn work to push the system to make sure launch goes smoothly.
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”.
Larry also informs everyone to be patient for it to appear for download as it won’t appear at the same time globally but is rolling out to the local online Store.