Two first time winners helped steer Western Australia and Queensland to the national titles in the Australian Ten Pin Bowling Championships at Rooty Hill Bowl on Thursday.

Veteran Michael Muir led WA to a last game win to edge out South Australia and Tasmania by one point to claim the Walter Rachuig Trophy in its 50th year of competition.

In the women's division Bianca Flanagan captained Queensland and justified her first state selection with a runaway nine point success over Victoria and NSW.

Muir has been bowling for 22 years and represented Australia at the 1998 Commonwealth Games in Kuala Lumpur as well as winning the South Pacific Classic and the Melbourne and South Australian Cups.

"It's the first win for me and WA and it is pretty special. It was the final item on my list to win and has kept me bowling for all these years," Muir said.

The 26-year-old Flanagan was making her first appearance in the tournament after a successful career at junior and youth level.

"We finished well after a disappointing start, especially as we were not one of the favourites," she said.

"It was an amazing win and added to the five national titles I had previously won at youth and senior tournaments."

Many of the leading bowlers will test their skills over the next two days as they contest the $112,000 International Masters against visiting overseas bowlers.