GWANGJU (AFP, REUTERS) - Hungary's Kristof Milak shattered Michael Phelps's 200 metres butterfly world record on Wednesday (July 24) as he stormed to his first world title.

The 19-year-old, who has been flirting with the American's 10-year-old mark this season, clocked a blistering 1min 50.73sec in Gwangju with Japan's Daiya Seto (1:53.86) pipping South African Chad le Clos (1:54.15) for silver.

Milak's new record broke Phelps' mark of 1:51.51 set at the world championships in 2009.

"It's a tremendous honour to beat such a great record," said Milak, who has already set his sights on next year's Olympics.

"Everyone will try to catch me, but I will be ready."

Meanwhile, Britain's Adam Peaty completed an unprecedented hat-trick of world doubles in the 50 and 100m breaststroke as he romped to gold in the one-lap final in 26.06.

The 24-year-old, who crushed his own 100m world record earlier this week, became the only swimmer to win six breaststroke world titles.

Italian Federica Pellegrini retained the women's 200m freestyle world title by pipping Australia's Ariarne Titmus to gold in a time of 1:54.22.