Rock secured his first title on the European Tour in almost two years in Graz, claiming five consecutive wins at the Stadthalle to take home the £35,000 top prize.
The Northern Irishman produced a clinical display to see off Patrik Kovacs 6-3 in his opening match on Saturday, missing just three darts at double to progress to Finals Day.
The World Cup champion then survived three match darts against Niko Springer to edge through a last-leg decider and reach the quarter-finals, where he put out a resurgent Cristo Reyes with a 6-4 victory, despite the Spaniard taking out a classy 170 checkout during the contest.
The 25-year-old faced his World Cup partner Daryl Gurney in the semi-finals, delivering a ton-plus average to bulldoze past his compatriot 7-3 and set up a mouth-watering final against Doets.
Four breaks of throw opened the showpiece, although the Dutchman took the initiative with an 11-dart hold to lead 3-2.Rock rallied, taking out a show-stopping 170 finish - the fourth Big Fish checkout of the day - as he stormed into a 5-3 lead.
Doets remarkably kept pace, capitalising on a sloppy missed dart at single 20 on a 78 finish from Rock to break and level the contest at 6-6.
Nevertheless, the Northern Irishman redeemed his error in the next leg, taking out 78 with his last dart in hand to immediately break back and throw for the match.A 14-dart hold sealed Rock’s maiden Austrian Darts Open and customary green jacket, as he finished the match with a stellar 101.56 average - his highest of the weekend.
2026 Elten Safety Shoes Austrian Darts Open
Sunday May 10
Afternoon Session
Round Three
Kevin Doets 6-2 Ryan Joyce
Luke Woodhouse 6-1 James Wade
Andrew Gilding 6-5 Kim Huybrechts
Rob Cross 6-4 Michael van Gerwen
Cristo Reyes 6-3 Danny Noppert
Josh Rock 6-5 Niko Springer
Martin Schindler 6-2 Ross Smith
Daryl Gurney 6-3 Madars Razma
Quarter-Finals
Kevin Doets 6-3 Luke Woodhouse
Rob Cross 6-1 Andrew Gilding
Josh Rock 6-4 Cristo Reyes
Daryl Gurney 6-2 Martin Schindler
Semi-Finals
Kevin Doets 7-3 Rob Cross
Josh Rock 7-3 Daryl Gurney
Final
Kevin Doets 6-8 Josh Rock