The 27-year-old trailed leader Joel Mueller of Switzerland by 0.35sec after the first run at the Shymbulak Ski Resort, but registered an unrivalled time of 1 min 07.82sec in his second to secure victory with an overall result of 2:12.77.

Mueller was fifth quickest in the second run, clocking 1:08.39 to take silver in 2:12.99.

His compatriot Cedric Noger came third overall in 2:13.39.

"I feel amazing, the hill was great," Bosca said.

"I am happy to be participating in the competition and to have achieved such a result. 

"I dedicate my victory to my skiing club and my coaches."

It was a disappointing day for defending champion Michelangelo Tentori with the Italian finishing 2.94 seconds off the pace in 14th.   

The men's super-G gold medallist was four places below fellow countryman Rocco Delsante, the giant slalom runner-up at the 2015 Winter Universiade, who was 2.50 back.

Alpine skiing action is due to continue tomorrow with the parallel nations team event.