A/N: Short update, and sorry for the delay in getting it done. I've got this weekend off, so I'll TRY to get another out over the weekend. Enjoy.
By the beginning of March, 1961, Titanic had completed her fitting out and was taking on board her new crew. This consisted primarily of engineering personnel to acquaint themselves with her new diesel electric propulsion system. A number of these men had transferred from Britannic. White Star was hoping that having these somewhat experienced men on hand would reduce some of the teething problems Britannic had gone through with the switch from steam turbines to diesel.
On March 13th, 1961 RMS Titanic departed Belfast for her sea trials under the command of Captain Frederick G. Watts, Commodore of White Star Line, having transferred command of Majestic to Captain William E. Warwick on March 6th. The sea trials were scheduled to last until the 17th at which point Harland & Wolff would perform any repairs needed, apply one last coat of fresh paint, and officially hand the ship over to White Star no later than March 31st. Fortunately for both Harland & Wolff and White Star, Titanic's sea trials went smoothly. Far better than Britannic's had three years earlier.
This was fortunate for White Star as they had a very intricate dance to perform getting Titanic into service. The plan was to sail Titanic to Southampton with a skeleton crew and have her meet with Laurentic on April 3rd. The majority of her crew would then transfer to Titanic and spend the next week familiarizing themselves with the new ship and preparing her for her maiden voyage. Laurentic's scheduled sailing on the 5th was to be covered by the Britannic, transferred temporarily to the Southampton to NY run.
The reason for retiring Laurentic a week early was due to White Star realizing that Titanic's systems were considerably more advanced than Laurentic's and time would be needed for the crew to become familiar with them. This fact was driven home to them on Britannic during her maiden voyage when the newly transferred crew from Oceanic had trouble with some of the ship's systems. So, building on that, it was determined to give the crew more than just a few days to familiarize themselves with their new vessel.
On April 10th, 1961 RMS Titanic officially joined White Star's fleet as she departed on her maiden voyage. The same day, Laurentic was officially decommissioned from service and sailed to Belfast to be laid up in reserve. Titanic would arrive triumphantly in New York on April 14th, 49 years to the day that her predecessor had had her near fatal collision with an iceberg. Like Britannic before her, she was immensely popular from the day she entered service. Though other lines had their own superliners, White Star's stood head and shoulders above the rest. No other line could compare to the sheer number of ships White Star operated, nor could they compare on the relative opulence and modern amenities offered on their liners. While other lines operated only a handful of ships, White Star sailed the world's oceans with a fleet of over twenty vessels. Offering weekly sailings to New York, Boston, Baltimore, Quebec, Sydney, the Mediterranean, Rio de Janeiro and Buenos Aires. With the introduction of Titanic, they planned to remain in that position for a very long time.
By May, 1962 Titanic's sister ship was ready for launching. The new Olympic slipped into the water at 9AM on May 25th, 1962. She was to incorporate several improvements over her older sister, such as a slight redesign of her foredeck to channel water away from her superstructure more efficiently. The other improvements were all internal, with some not even being noticeable to passengers. These included a more streamlined electrical architecture and slight shrinking of the exhaust pipes from the diesel engines providing enough space aboard ship for several additional cabins. Harland and Wolff began fitting her out immediately.
It was at this time that White Star began planning for the retirement of Mauritania. She was 21 years old and had seen hard service during the war shortly after her launch. She would also be the slowest ship in the fleet at 29 knots when all the Britannic and Baltic-class ships were completed. As a one off, she was also the most expensive to maintain. In the end, it was decided to retire her in 1966, when she reached 25 years old. At that time, Cunard would become nothing but a memory.