The Coast Guard confirmed on June 22 that the five passengers were dead after the submarine imploded. Debris was found by some people in the search effort and it was later confirmed that it came from the Titan, reports USA Today.
The Titan ended up being found incredibly close to the Titanic. We don't know if this means that the passengers ended up seeing the Titanic or if the debris just ended up sinking and settling by the ship. In fact, the debris was only 1,600 feet away from the ship.