Hull had made it clear on Wednesday before the tournament started, that her goal was to unseat the seven-time major winner Webb as Australia's number one ranked player and even mentioned she was hoping for a Sunday showdown with her elder.
However, that duel did not materialize, as Webb struggled to a closing 1-over 73, which included one double bogey and four bogeys to finish 3 under for the tournament and tied for 30th.
Australias Tamie Durdin (70) and South Koreas Ryu So-yeon (67) tied for second.
The most disappointing thing about the day was I felt really good going to the first tee, Webb said. I actually believed that I could shoot something that would give me a chance if the wind got up.
Webb thinks shell play well at next weeks Womens Australian Open, where shell be trying for her sixth national title.
Even though it didnt look like it, there was some good feels with the putter, she said. Its probably the best Ive felt for a long time.