Like a great iron Sphinx on the ocean floor, the Titanic faces still toward the West, interrupted forever on its only voyage. We see it in the opening shots of “Titanic,” encrusted with the silt of 85 years; a remote-controlled TV camera snakes its way inside, down corridors and through doorways, showing us staterooms built for millionaires and inherited by crustaceans. These shots strike precisely the right note; the ship calls from its grave for its story to be told, and if the story is made of showbiz and hype, smoke and mirrors--well, so was the Titanic. She was “the largest moving ...