Favorite Barty retaliated from 5-1 down in the second set to win 6-3 7-6 (7-2) on an upbeat Rod Laver Arena.
The 25-year-old Queenslander has won the title without dropping a set in Melbourne this fortnight.
“This is a blessing from heaven for me. I am so glad for being Aussie,” said world number one Barty.
“As an Aussie, the main piece of this competition has been having the option to impart this experience to the fans.
“This group is one of the best time I’ve played before.”
Tending to the group, she added: “You loosened up me and constrained me to play my best tennis. Much thanks to you.”
In the wake of winning the 2019 French Open and last year’s Wimbledon title, Barty has now asserted three of the four majors.
With a hardliner 12,000-in number group and a home country watching on, Barty began and finished the last looking unburdened by the heaviness of assumption.
In the middle, there were restless minutes as Collins, disturbing Barty with her strong returning, acquired a twofold break in the subsequent set.
In any case, Barty had dropped just 21 games while heading to the last and, albeit the subsequent set hoped to have away from her, she recovered splendidly to turn the match back in support of herself.
Among those watching was Chris O’Neil, the last Australian to win the men’s or alternately ladies’ singles title in Melbourne.
Barty, seldom defeat by feeling, yelled with amuse when she secured the title with a cross-court forehand victor.
Practically everybody inside Rod Laver Arena leaped to their feet, thundering their endorsement, numerous with camera telephones close by to catch a hotly anticipated second for the country’s avid supporters.
The world number one’s alleviation was clear.
Barty gripped the two clench hands as she dropped to her rump, prior to coming up short on the side where she coaxed previous pairs accomplice Casey Dellacqua, presently a TV expert, on to court for a warm embrace.
Subsequent to arriving at the Melbourne semi-finals in 2020, with quarter-last losses coming in the years either side, Barty at last handled the prize she truly cared about.
Triumph proceeded with her preeminent structure in 2022, and she has now won each of the 11 of her singles matches this year.
Subsequent to beating three top-20 players to win the Adelaide International title, she has proceeded with that predominance in Melbourne.
Barty, who had some time off from tennis in 2014 to seek after an expert cricket vocation, has frequently honored Dellacqua’s effect on her prosperity and the kiss on her companion’s brow showed her appreciation.
There was one more extraordinary second for Barty – and the home fans – when the player’s golden calf, Evonne Goolagong Cawley, hit on court to give her the Daphne Akhurst prize.
Since O’Neil’s victory in 1978, four players – Kim Warwick, Wendy Turnbull, Pat Cash and Lleyton Hewitt – had lost in the men’s or alternately ladies’ singles last.
There had been home accomplishment in the wheelchair and quad occasions, through David Hall and Dylan Alcott, and in the duplicates occasions.