WAAIA was made to work extremely hard for its 19 point win over Katamatite in the first qualifying final on Saturday.
Playing on their home ground, the Bombers were a point down at the half time break.
The home ground advantage did not appear to faze the Tigers, as they came out and booted five goals in the third quarter to extend their lead to seven points at three quarter time.
Waaia received a rev up in the last huddle and came out fighting, knuckling down to overrun the Tigers in the last quarter in what was a terrific match.
Miles Rowlands was superb in the ruck, winning almost every hit-out. Ash Thompson was sensational around the ground with two goals and delivering pinpoint passes to Mark Meyland who finished with four goals.
Bill Brown and Brayden Coates were strong all day, while Sam Richardson and Jesse Trower also played well.
Waaia now has a week off and will next play in the preliminary final which will be held at Strathmerton at 2:05pm, Sunday week.
Waaia reserves faced off against Rennie, who they had not played since the opening round of the season, and were defeated by 58 points on Sunday.
The Hoppers were too strong from the outset, keeping the Bombers goalless for the entire match.
Damian Hommes tried hard all day, as did Hayden Hixon in the ruck. Mason Sprunt and Mark Bergamin played well and were ably supported by Aden McCredie and Glen Payne.
Waaia will now play Katunga in the first semi final this Sunday, 12:30pm at Yarroweyah.