Titans are parahumans who have undergone a 'broken' second trigger, which results in their shard taking full agency over their body. You have dodged losing control of your body, but have still gained the ability to transform into a state were your shard is dominant and all of your powers lose their limits. Any powers you take are buffed to be at around the level an Endbringer's might be, and you have access to the full breadth of your shard.