Turner arrived in Dubai with a revised plan from the London world championships two years ago, and executed it beautifully here.
Alongside his coach Iryna Dvoskina he won the 100m on Sunday and the 400m – both in world record times.
“I’ve done my job so I’m quite satisfied with that. The 51.71 seconds is a PB, great time, very happy with it,” he said.
It was Turner’s fifth gold medal from two world championship appearances and Australia’s seventh in Dubai.
Keefer kept her remarkable world championships run intact with a bronze in the shot put (F41) on Thursday night.
She made everyone hold their breath in the sixth and final round, when she let out her longest throw of the night of 9.19m that moved her back into the medals.
On the track, wheelchair racer Rheed McCracken qualified for Friday’s final of the men’s 800m (T34) by placing third in Thursday night’s heat (1:52.07).