Director James Cameron used a decoy title in case other studios were making films about the RMS Titanic. Clever? Yes, but the fake title didn't stop Leonardo DiCaprio fans from congregating near the gates of Fox Baja Studios in Mexico during filming.
As in Tom Cruise, Brad Pitt, and Jeremy Sisto of Clueless fame. (Jeremy even did a screen test with Kate Winslet, but obviously did not get the best test results.) Can you imagine anyone else wearing this (borrowed) suit to dinner in First Class?