not including fractured title (there were more of them when Tyson was fighting), ali won the world title three times. Tyson unified the world title in '88 and then won two separate versions of the title in '96.
he beat trevor berbick in November 1986 to win the wbc title. http://www.boxrec.com/list_bouts.php?human_id=474&cat=boxer
he was 20 when he beat trevor berbick in nov '86 for the wbc belt.
Tyson was 27 wins, no losses with 25 knockout wins, when he beat Trevor Berbick for his first title (the wbc belt)
Mike Tyson unifying the heavyweight title beating the WBA champ James "bonecrusher" smith and IBF champ Tony Tucker (Tyson had already won the WBC belt the previous November).
He won his 1st Title on November 22, 1986 against Trevor Berbick. http://www.boxrec.com/list_bouts.php?human_id=474&cat=boxer
For the World Heavyweight Championship belt, Edge had the title for a total of 7 reigns. For the WWE World Heavyweight Championship belt, John Cena had the title for a total of 12 reigns.
Ali won the Heavyweight Title on 3 different times Ali first won the Heavyweight Title when he stopped Sonny Liston on February 25, 1964. Ali won the Heavyweight Title the 2nd time when he stopped George Foreman on October 30, 1974. Ali won the Heavyweight Title a 3rd time when he beat Leon Spinks in their rematch on September 15, 1978.
The Great Khali has held the World Heavyweight belt one time
Primo Carnera won the world title in 1933. and Francisco Damiani was the first winner of the WBO belt in 1989.
Flair won his first title in WWE in Jan 1992 at the Royal Rumble Pay Per View in Albany New York. It was for World Heavyweight Title
Tyson was 221 and a quarter pounds when he fought Trevor Berbick for the WBC title in November 1986. He weighed 219 when he took the WBA belt from "Bonecrusher" Smith in march '87. And he was 221 when he beat Tony Tucker for the IBF belt in august '87. He was 218 when he beat Michael Spinks for the linear championship in June '88.