London Olympian Tommaso D'Orsogna collected his second gold medal of the FINA shortcourse World Cup meet in Qatar on Sunday night to cap a strong showing by Australian swimmers.

D'Orsogna won the 200m freestyle in a time of 1min 43.84sec, touching out South African Darian Townsend while fellow Australian Robert Hurley finished third in 1:44.05.

The 21-year-old D'Orsogna's victory added to his dead-heat for first with NSW swimmer Kenneth To in the 100m freestyle the previous night and gave Australia six golds for the event in Doha.

Victorian Rachel Goh had to settle for silver in the women's 100m backstroke, while Hurley and Ashley Delaney won silver and bronze respectively in the men's 50m backstroke.

Delaney and Kyle Richardson picked up bronze medals in the men's 200m backstroke and men's 50m free.

The FINA World Cup series now moves to Stockholm next weekend.

Meanwhile, 22-year-old West Australian open water swimmer Rhys Mainstone won gold at the Hong Kong FINA 10km marathon swim to snare the first major international victory of his career.