HMS Immortalité was one of seven armoured cruisers built for the Royal Navy in the mid-1880s. She was sold for scrap on 11 January 1907.
Immortalité had a length between perpendiculars of , a beam of and a draught of . Designed to displace , all of the Orlando-class ships proved to be overweight and displaced approximately . The ship was powered by a pair of three-cylinder triple-expansion steam engines, each driving one shaft, which were designed to produce a total of and a maximum speed of using steam provided by four boilers with forced draught. The ship carried a maximum of of coal which was designed to give her a range of at a speed of . The ship's complement was 484 officers and ratings.
Immortalités main armament consisted of two breech-loading (BL) Mk V guns, one gun fore and aft of the superstructure on pivot mounts. Her secondary armament was ten BL guns, five on each broadside. Protection against torpedo boats was provided by six quick-firing (QF) 6-pounder Hotchkiss guns and ten QF 3-pounder Hotchkiss guns, most of which were mounted on the main deck in broadside positions. The ship was also armed with six 18-inch (457 mm) torpedo tubes: four on the broadside above water and one each in the bow and stern below water.
The ship was protected by a waterline compound armour belt thick. It covered the middle of the ship and was high. Because the ship was overweight, the top of the armour belt was below the waterline when she was fully loaded. The ends of the armour belt were closed off by transverse bulkheads . The lower deck was thick over the full length of the hull. The conning tower was protected by of armour.
Immortalité, named for the French frigate Immortalité captured in 1798, was laid down on 18 January 1886 by Chatham Royal Dockyard. The ship was launched on 7 June 1887, and completed in July 1889.
In March 1900 she had successful machinery trials in the North Sea, and was transferred to the A division of the Medway Fleet Reserve. She was commissioned at Chatham on 21 May 1901 by Captain Sackville Carden as seagoing tender to the Wildfire, flagship at Sheerness. She took part in the fleet review held at Spithead on 16 August 1902 for the coronation of King Edward VII, and two months later Captain Archibald Peile Stoddart succeeded Carden in command on 16 October 1902.