Up against her Australian team-mate Kristina Krstic, the rising lawn bowls star showed nerves of steel to claim the biggest title of her young career. 

After hotly contested and closely-fought final, the world title was Stewart's, winning by four shots in the first-to-21 format. 

"It is unbelievable," Stewart said. 

"I am still in shock, I can't believe I have won."

Stewart said it was tough facing off against a friend and Aussie countrywoman. 

"We had been staying together the previous week and I know her well, but I had to just put that aside and just focus on the game," she said. 

The 18-year-old said the final was a wayward battle with the momentum continuing to change throughout the match. 

"I started well, I had a 14 to 2 lead, but she was able to slowly get back into the match and got the score back to 14 to 10," Stewart said. 

"I was able to get out to another lead and she came back, so heading into the last end it was 20 to 17. 

"With the last bowl I was able to win the match. 

"I was over the moon."

Australia's top-18 female lawn bowler award winner said it was always an honour to represent your country. 

"I am extremely proud," Stewart said. 

"When I put on the green and gold for the first time a couple of years ago it was a great thrill. 

"Ever since then I have been wanting to keep doing it.

"Now I am waiting to get that call-up into the senior Australian team."

Stewart is now preparing to play in the New Zealand Prestige Pairs tournament with Australian Open champion Ian Johns.   

"I am really looking forward to it," she said. 

"There is about 16 of us, who will represent Australia."

Stewart, a La Trobe University Bendigo student, wanted to thank the school for their continuous support over the past year.