Unchain My Heart has signed off from racing in fitting fashion with an historic second-straight victory in the Andrew Ramsden Stakes at Flemington.

The seven-year-old is entered for auction at a broodmare sale at the Gold Coast next week and she heads there after becoming the first mare to win the Listed 3200-metre race at Flemington in successive years.

Trainer David Hayes was convinced Unchain My Heart ($7.50) was going into this year's renewal every bit as good as last year and the stayer proved it as she sprinted down the outside to win by 2-1/2 lengths over Vatuvei ($31) with Gotta Take Care ($8) a short head away third.

"She relaxed and it was a beautiful ride by Craig Newitt," Hayes said.

"He didn't spend a penny the whole race and I think the difference was the dry ground. She was better on the dry ground today than on the wet (last start)."

Newitt got the ride when Dwayne Dunn opted to partner favourite Ominous, who was in a position to win in the straight but Dunn said he failed to stay the trip and finished sixth.

"I told him (Dunn) that the mare was flying," Hayes quipped.

Newitt had only ridden Unchain My Heart once before for a Seymour defeat in 2011 but said the mare gave him a great ride, settling back in the field before working into the race steadily.

"She's only got a short but pretty deadly turn of foot," Newitt said.

"I tried to creep up steadily and once she peeled to the outside she was really good.

"She's a mare that deserves to go out a winner."

Syndicator Joe O'Neill from Prime Thoroughbreds bought Unchain My Heart out of a paddock for $47,500 and said the mare's 10th win from 52 starts, and her third Listed staying win at Flemington after also claiming the 2012 Bagot Handicap, was a fitting way to bow out.

"She's a rising eight-year-old mare. She'll get a good home as a broodmare," he said.