"RMS" means "Royal Mail Ship". (Some say "steamer.") This title shows that the Titanic had a charter from the British government to carry British mail. Occasionally the prefix HMS (His Majesty’s Ship) is seen in print, but that usage is incorrect since H.M.S. is reserved for British war ships. The names "Olympic", "Titanic", and "Gigantic" come from Greek mythology. The ancient Greeks believed that the universe created the gods, not the other way around. The earliest generation of gods created by mother earth was the Titans. They were attacked and defeated by their children, and the new ruling circle of gods made their home on Mount Olympus. During this war, the race of Giants came to the defense of the Titans, but was killed off in the course of battle.
Read more at www.rmstitanic.net/index.php4?page=faq
There's an artifact exhibition for the Titanic at the Sony Metreon. This picture is of the replica created in front of the exhibit.