Cunard White Star withdrew Mauretania from service following a final eastward crossing from New York to Southampton in September 1934.
The voyage was made at an average speed of 24 knots (44 km/h; 28 mph), equalling the original contractual stipulation for her mail subsidy.
She was then laid up at Southampton, her twenty-eight years of service at a close.

In May 1935 her furnishings and fittings were put up for auction by Hampton and Sons and on 1 July that year she departed Southampton for the last time to Metal Industries shipbreakers at Rosyth.
One of her former captains, the retired commodore Sir Arthur Rostron, captain of RMS Carpathia during the Titanic rescue, came to see her on her final departure from Southampton.
Rostron refused to go aboard Mauretania before her final journey, stating that he preferred to remember the ship as she was when he commanded her.

En route to Rosyth, Mauretania stopped at her birthplace on the Tyne for half an hour, where she drew crowds of sightseers.
Rockets were fired from her bridge, messages relayed, and she was boarded by the Lord Mayor of Newcastle.
The mayor bade her farewell from the people of Newcastle, and her last captain, A. T. Brown, then resumed his course for Rosyth.

Approximately 30 miles north of Newcastle is the small seaport of Amble, Northumberland.
The local town council sent a telegram to the ship stating, "Still the finest ship on the seas."
To which Mauretania replied with, "to the last and kindliest port in England, greetings and thanks."
Amble, to this day, is still known as 'Amble, the Friendliest Port', and this is still seen on signs when entering the town.

With masts cut down to fit, the ship passed under the Forth Bridge and was delivered to the breakers.

Mauretania arrived at Rosyth in Scotland at about 6 am on 4 July 1935 during a half-gale, passing under Forth Bridge.
By 6:30 am she passed the entrance to the Metal Industries yards under the command of Pilot Captain Whince.
A lone kilted piper was present at the quayside, playing a funeral lament for the popular vessel.
It was reported to author and historian John Maxtone-Graham that upon the final shut-down of her great engines, she gave a dark "final shudder...".
Mauretania had her last public inspection on 8 July, a Sunday with 20,000 in attendance, with the monies raised going to local charities.
Scrapping began shortly after and with great rapidity.
Unusually, she was cut up afloat in drydock, with a complex system of wooden battens and pencil marks to monitor her balance.
In a month her funnels were gone.
By 1936 she was little more than a hulk, and she was beached at the tidal basin at Metal Industries and her remaining structure was scrapped by 1937.

To prevent a rival company using the name and to keep it available for a future Cunard White Star liner, arrangements were made for the Red Funnel Paddle Steamer Queen to be renamed Mauretania in the interim before the launch of the new RMS Mauretania in 1938.

The demise of the beloved Mauretania was protested by many of her loyal passengers, including President Franklin D. Roosevelt, who wrote a private letter against the scrapping.
Cunard White Star withdrew Mauretania from service following a final eastward crossing from New York to Southampton in September 1934. The voyage was made at an average speed of 24 knots (44 km/h; 28 mph), equalling the original contractual stipulation for her mail subsidy. She was then laid up at Southampton, her twenty-eight years of service at a close.
In May 1935 her furnishings and fittings were put up for auction by Hampton and Sons and on 1 July that year she departed Southampton for the last time to Metal Industries shipbreakers at Rosyth. One of her former captains, the retired commodore Sir Arthur Rostron, captain of RMS Carpathia during the Titanic rescue, came to see her on her final departure from Southampton. Rostron refused to go aboard Mauretania before her final journey, stating that he preferred to remember the ship as she was when he commanded her.
En route to Rosyth, Mauretania stopped at her birthplace on the Tyne for half an hour, where she drew crowds of sightseers. Rockets were fired from her bridge, messages relayed, and she was boarded by the Lord Mayor of Newcastle. The mayor bade her farewell from the people of Newcastle, and her last captain, A. T. Brown, then resumed his course for Rosyth.
Approximately 30 miles north of Newcastle is the small seaport of Amble, Northumberland. The local town council sent a telegram to the ship stating, "Still the finest ship on the seas." To which Mauretania replied with, "to the last and kindliest port in England, greetings and thanks." Amble, to this day, is still known as 'Amble, the Friendliest Port', and this is still seen on signs when entering the town.
With masts cut down to fit, the ship passed under the Forth Bridge and was delivered to the breakers.
Mauretania arrived at Rosyth in Scotland at about 6 am on 4 July 1935 during a half-gale, passing under Forth Bridge. By 6:30 am she passed the entrance to the Metal Industries yards under the command of Pilot Captain Whince. A lone kilted piper was present at the quayside, playing a funeral lament for the popular vessel. It was reported to author and historian John Maxtone-Graham that upon the final shut-down of her great engines, she gave a dark "final shudder...". Mauretania had her last public inspection on 8 July, a Sunday with 20,000 in attendance, with the monies raised going to local charities. Scrapping began shortly after and with great rapidity. Unusually, she was cut up afloat in drydock, with a complex system of wooden battens and pencil marks to monitor her balance. In a month her funnels were gone. By 1936 she was little more than a hulk, and she was beached at the tidal basin at Metal Industries and her remaining structure was scrapped by 1937.
To prevent a rival company using the name and to keep it available for a future Cunard White Star liner, arrangements were made for the Red Funnel Paddle Steamer Queen to be renamed Mauretania in the interim before the launch of the new RMS Mauretania in 1938.
The demise of the beloved Mauretania was protested by many of her loyal passengers, including President Franklin D. Roosevelt, who wrote a private letter against the scrapping.
RMS Mauretania (1906)