The Scottish champion from Coatbridge took an early 5-2 lead after four ends but then lost two successive maximum fours on the next two ends to allow Newman, the 22-year-old from the Whiteknights club, to jump into a 10-5 lead.
The Scot did narrow the gap to 10-13 after 12 ends but then Newman stepped up a gear and a run of one, two and three took him 19-10 ahead after 15 ends and a double two ends later sealed his 21-11 win.
Scotland claimed the opening two finals at the championships when they captured both the pairs and triples titles. In the triples, Willie and Darren Burnett with Doug Farquharson, from Arbroath, beat another father and son pairing, Harry and John Price, with Stephen Rees, 24-14.
In the pairs, Richard Corsie, the holder of the Scottish and world pairs titles, added the British version for a unique treble when he came from behind with Willie Galloway to beat David Harding and Jason Greenslade, from Cardiff, 19-18.Reuse content