The Jillaroos have advanced to the inaugural World Cup Nines final after trouncing England 42-6 in their pool match on Saturday.
Skipper Ali Brigginshaw continued her hot tournament form with the opening try, and it was all one-way traffic from then on at Bankwest Stadium.
England simply had no answer to the title favourites as Shakiah Tungai, Corban McGregor, Jessica Sergis and Tiana Penitani also scored.
An Isabelle Kelly try with the final play of the game ensured Australia’s women posted the biggest score of the tournament so far.
The victory means the Jillaroos are already in the final against either England or New Zealand, with Papua New Guinea now no chance of qualifying.
Earlier, New Zealand beat PNG 24-12 for their first win.
Winger Honey Hireme and centre Kiana Takairangi claimed doubles as New Zealand regrouped after their opening-night loss to Australia, who face PNG in their final pool match.