HONGKONG'S Mark McMahon put recent disappointments behind him and confirmed his top-class credentials by winning the Adelaide Masters title yesterday. Last month McMahon suffered a double snub from selectors, losing his Hongkong singles place and being demoted in the rinks team for July's Pacific Championships. He had originally been picked as skip for the four-man Hongkong team but was then relegated to play number three, a decision which prompted a war of words between the player and bowling officials. In Adelaide yesterday McMahon hit back at his critics with a resounding performance to beat old rival and Commonwealth Games gold medallist Rob Parella 25-19 for the title. It was the second time McMahon had beaten Parella, who condemned McMahon to the silver medal in the 1990 Commonwealth Games in Auckland. McMahon's relentless driving and accurate drawing continually frustrated the Australian. ''Parella drove well in the beginning but I drew my shots very accurately and Parella lost his temper a bit under pressure,'' said McMahon, who won A$3,000 first prize money. The competition field featured 32 of the best bowlers in the Southern Hemisphere. McMahon beat last year's World Indoor title-holder Ian Schuback in the semi-final.