The unbeaten Fremantle has sent an ominous warning to its AFLW rivals, producing a ruthless performance to comfortably account for Gold Coast in a bruising semi-final on Saturday.

The Dockers were a class above their youthful opponents, moving through the gears throughout the afternoon on their way to a 70-point victory at Fremantle Oval.

The 12.8 (80) to 1.4 (10) win sees Fremantle set up a highly anticipated preliminary final bout with Melbourne next week, while ending the impressive debut campaign of a plucky Gold Coast side.

Typical of its brave maiden AFLW season, Gold Coast was stringent defensively throughout a hard-fought opening half and looked to be well and truly in the contest before a late Fremantle flourish on the stroke of the main break broke the game open.

Lively forward group Gabby O'Sullivan, Kate Flood, Sabreena Duffy and Gemma Houghton all got among the action to kick multiple goals, while a strong pack mark and a composed finish from Roxy Roux extended the home side's advantage to 27 points at the interval. 

What could have been? After earning a free kick following a brave contest, Gold Coast's Tiarna Ernst failed to convert from just 15m out. The kick could have cut Fremantle's lead to just two points with a few minutes remaining in the first half.

However, just like that, the SUNS deficit instead grew to 27 points by the interval. Ernst later left the field and didn't return as a result of the heavy hit.

That lead continued to build throughout a routine second half for the Dockers, who kicked 10 consecutive goals after quarter time to rub salt into the wounds of the tiring SUNS and ease into the next week of the finals.

FREMANTLE       2.3     5.5     8.6    12.8 (80)
GOLD COAST     1.1      1.2    1.3      1.4 (10) 

GOALS
Fremantle: Duffy 3, Flood 2, O'Sullivan 2, Houghton 2, Roux, E.Antonio, Sharp
Gold Coast: Parker

BEST
Fremantle: Bowers, E.Antonio, K.Antonio, O'Sullivan, Miller, Roux, Duffy
Gold Coast: Yorsten, Pregelj, Surman, Ahrens, Stanton

INJURIES
Fremantle: Nil
Gold Coast: Hewett (concussion), Ernst (concussion) 

Reports: Nil