It fetched a record price for a piece of written correspondence from the ship, which sailed from Southampton in April 1912.
The letter, written on three sides of stationery, is penned by Adolphe Saafeld and is addressed to his “wifey”.
The letter in the auction was placed in the mail from Southhampton, England just prior to the ship’s departure on April 10 for its never-completed trans-Atlantic crossing to New York City. It was sold to an unidentified British museum at an auction in Wiltshire.
The letter was written five days before the ship sank on 15 April and gives an insight into life on the maiden voyage of the Titanic.
Andrew Aldridge, from the auction house, said: “The content is superb.
“It gives a real first-person perspective of what life was like onboard, through the eyes of a first-class passenger, right down to the food, the size of the cabin and the decoration.”
He said it was the best letter of its kind, due to its depth of detail.
In it, Mr Saafeld writes about the smoothness of the journey, and describes eating a “luncheon” of soup, plaice, a loin chop with cauliflower and fried potatoes “washed down with a large Spaten beer iced”.
He also writes about a near-collision with a ship called New York, which was averted by “our stopping & our tugs coming to the rescue of the ‘New York’.”
Also sold at the auction was a set of keys kept by an officer who transferred from the Titanic before it left Southampton, which fetched £54,000.
The keys would have been stored in a box on the ship’s bridge but the officer was moved to another ship at short notice and took the keys with him.
One picture, of Rosa Abbott, who was pulled from the water after the ship sank, fetched £35,000 and was bought by a private collector.