They bowled over current world champions Jo Edwards and Val Smith 22-15 to win the final.
"I knew who Carolyn was but I'd never played a game with her and I really knew nothing about her," Muir said.
"It's a dream come true for me but she [Crawford] made it very easy."
Muir is the first Bowls New Zealand president to win a national title while holding the top job. It was her second national title as she was lead in the Kensington club four that won the title in 2005.
The retired teacher, who has a Commonwealth Games bronze medal, has dedicated over 40 years to playing, coaching and administrating the sport.