Usain Bolt has won the 100 m title.
Usain Bolt . An eight-time Olympic gold medalist , Bolt won the 100 m , 200 m and 4 × 100 m relay at three consecutive Olympic Games , although he subsequently lost one of the gold medals ( as well as the world record set therein ) nine years after the fact due to teammate Nesta Carter 's disqualification for doping offences . He is the most successful athlete of the World Championships and was the first athlete to win three titles in both the 100 m and 200 m at the competition .