I am aiming to get a list of a users friends in order to invite them to use our app but this is no longer possible in Graph API v2.0. The user/friends endpoint now only returns friends who also use the app.
This is a design decision from Facebook and so the Titanium documented route of using presentSendRequestDialog is no longer possible for this purpose.
Facebook instead now forward me to use their new service 'App Invites', however I don't believe that this has been incorporated into the Titanium module yet.
Facebook - Deprecating friends permissions: https://developers.facebook.com/docs/apps/faq#friends_list
Facebook - How can I now invite my friends: https://developers.facebook.com/docs/apps/faq#friend_invite
Facebook - App Invites main documentation: