On 19 September, the new cargo vessel got under way from Hampton Roads for training in Chesapeake Bay; then, in October, she conducted landing exercises to prepare for the Allied invasion of North Africa.

On the afternoon of 12 November the Titania, escorted by the destroyer Cole (DD-155), steaming toward Fedhala, Morocco, was attacked by the German (Kriegsmarine) U-boat U-130 but suffered from no damage.

On 5 March, while the transport was steaming from Guadalcanal to New Caledonia with a load of disabled aircraft, an unidentified plane dropped three bombs unnervingly close to her — only 10 to 20 meters astern.

On the 13th, the Titania witnessed an air engagement taking place over Cape Esperance as American planes intercepted Japanese raiders attempting to approach Henderson Field.

She returned to Nouméa on 1 July and spent almost four months shipping military equipment, stores, and troops in the waters east of Australia.

In the last week of October, the Titania departed from Guadalcanal to rehearse the coming assault on Bougainville, the northmost of the Solomon Islands.

Hit by machine gun fire from the attack transport, the Japanese plane began to smoke; then splashed several miles away.

On 8 November 1943, the Titania was back at Empress Augusta Bay, Bougainville, unloading needed troops and equipment when the Japanese struck with a full-scale air raid.

The Fuller (AP-14) was damaged during this attack, but the Titania escaped unscathed, despite three bombs which exploded nearby and one dud which barely missed the ship.

On 12 January 1944, she disembarked elements of the 12th Marine Regiment, as well as supplies and equipment for units of the Americal Division, then operating near Cape Torokina.

The Titania began unloading cargo shortly before 10:00 and, for the next four days, discharged vital war supplies, including ammunition, to support American fighting men in the bitter struggle taking place on shore.

Early in December 1944, the Titania took part in exercises in Huon Gulf, New Guinea, then anchored in Seeadler Harbor, Manus Island.

Despite a heavy cross-swell which made unloading difficult, the Titania serviced small craft and discharged her cargo of vehicles, ammunition, and gasoline, as well as personnel.

The Titania's first shore parties discovered soft, sticky, mud beaches and a 10-foot tidal range, both of which slowed and hampered unloading efforts.

Seventy tons of bridge planking from the transport's hold completed the repair job and made it possible for trucks to load from the pier at four hatches.

Under these improved conditions, the Titania discharged the materials, engineering equipment, and supplies needed to construct and operate an airfield at Tarakan by the 9th.

On 10 June, Z-day, the transport arrived off the "Oboe Six" assault area and unloaded her cargo despite a surprise air attack by a Japanese "Nick" which dove out of low clouds and dropped a bomb which exploded some 300 meters off her port beam.

Throughout the next two years, she continued to shuttle between the west coast of the United States and the islands of the Pacific, carrying cargoes to occupation forces.

unit from Naha to Pusan, docking there 7 July;[1] then returned to Japan to embark marines and troops of the 1st Cavalry Division for the assault on Pohang.

There, she began taking on ammunition and marine cargo; but in the early hours of 15 August, before the loading had been completed, a fire broke out in her number 1 boiler.

On 25 September, only 10 days after the initial landings at Inchon, Titania arrived off that port to unload marines, equipment, and ammunition, and to embark members of the 1st Naval Beach Group.

Although Titania did not come under fire, frequent alerts and the sights and sounds of night shore bombardment made this a tense operation.

Rough seas, rain, and snow hampered the ship's operations during the winter months, taxing the resilience and resourcefulness of her crew on many occasions.

Following the cessation of hostilities in the summer of 1953, Titania remained in the Far East operating out of Japanese ports and in Korean waters until February 1954 when she returned to San Francisco.