It was mission accomplished for the in-form Inverness 15-year-old in Aberdeen.
Alasdair, who wants to become a professional player, was in outstanding form from the very beginning of the tournament, cruising through four matches without dropping a game.
Reflecting on his performance after the final, Alasdair said: “I am obviously very pleased. I went in with a gameplan and thought I stuck to it pretty well.
“It is great to have won. Scottish National titles are right up there with the most important ones you can win.”