Mr Davis was one of Australia's oldest surviving veterans and was amongst the 14,000 diggers who held Libya's Tobruk port in a 241-day siege against German and Italian forces in 1941.
Mr Davis and his fellow soldiers, who included 19,000 allied soldiers, were dubbed the "Rats of Tobruk" for their efforts during the eight-month campaign.
"The defenders of Tobruk did not surrender, they did not retreat. Their determination, bravery, and humour, combined with the aggressive tactics of their commanders, became a source of inspiration during some of the war's darkest days," the Australian War Memorial said on Friday.
Mr Davis fell ill days before Anzac Day this year but secured a leave pass from hospital to attend a ceremony at Sydney's Town Hall, where he laid a wreath in honour of his fellow World War II veterans.
"It was harder to get out of the hospital than it was to get out of the army," he joked to family, according to the Australian Remembrance Foundation, which announced Mr Davis had died on Thursday.
Mr Davis also on Monday attended a ceremony at the cenotaph in Sydney's Martin Place to mark the 77th Victory in the Pacific Day with fellow veterans.
Mr Davis is included in the Department of Veterans' Affairs stories of service program, which highlights the experience of Australian veterans to support the learning of Australia's military history.
Mr Davis was born in London and migrated to Sydney before enlisting in 1940.
Following the Siege of Tobruk, his division was moved to Syria where he served in a newly formed ski unit.
He returned to Australia, married his fiancée Margaret in 1943 and was deployed overseas again in New Guinea and Borneo before being discharged in November 1945 and returning to his job at the tax office.
The pair were married for 61 years until Margaret died in 2004.
Mr Davis is survived by two children, seven grandchildren and twenty great-grandchildren.
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