Muhammad Ali is the only fighter to win the linear heavyweight title three times, but others who won (at leaast) partial titles at least 3 times include:
evander holyfield (4) two linear titles and two partial belts
vitali klitschko (3) one linear belt
Mohammad Ali or Cassius Clay was the first boxer ever to win the world heavyweight title thrice.
Muhammad Ali won the title three times, Lennox Lewis won portions of the title 3 times, and Evander Holyfield won portions of it 4 times.
muhammad ali and holyfield
mike tyson
lennux lewis
it is between light-heavy weight and heavy weight (between 176-200lbs)
Buster Douglas
Between 205-265 pounds.
Muhammed Ali
Jack Johnson was the first black heavy weight champion of the world.
World Heavy weight championship
Mark henry
That he is the heavy weight championship
theofilo stevenson
Joe Louis.