The 20-year-old NSWIS rider from Jindabyne also took home a silver medal in the individual event, completing a hugely successful season which also included four World Cup podiums including two victories, a silver medal at her first ever World championships together with a third place world ranking on the end of season standings.
Baff won every round on her way to the big-final, but just missed out on the victory finishing in second place with Lea Casta of France taking the gold medal, and Celia Trinkl of Germany rounding out the podium in third.
Joining Baff in the women's event was Abbey Wilson (9th), Taya-Lilli Dent (13th), Maya Billingham (17th) and Lara Walsh (33rd).
In the men's individual event, James Johnstone was the leading Australian finisher making it through to the quarter finals in 13th. Also in action was William McCarthy (25th) with Max Vardy, Angus Jones, Cameron Turner and William Martin all ranked equal 33rd.
As the two leading finishers in the individual event, Baff teamed up with Johnstone in the Mixed Team event in AUS #1, with the pair winning each heat round to advance through to the big-final.
Drawn against two teams from France, and one from Italy in the big-final, Johnstone started things off for Australia, crossing the line in third place, 0.44 seconds behind first.
In the final run, Baff then closed the time gap and chased down the two teams in front, crossing the line comfortably in first place, 2.24 second ahead of the teams from France in second and third, with Italy in fourth..
Australia had two more teams in action, with Max Vardy and Maya Billingham finishing in ninth, with William McCarthy and Abbey Wilson in 17th.