The 29-year-old Indian snooker pro, ranked 50th in the world, was beaten 70(63)-0, 78-27, 77-13, 18-73, 0-76, 81-1 by the 32-year-old English world no. 8 and his exit ended the home country's challenge in the tournament's second edition.
Mehta had lost to Ding Junhui in the final of the inaugural edition of the tournament held in Delhi in October, 2013, but this time around failed to recreate that magic.
Mehta, the lone Indian pro card holder, had raised visions of another fairy-tale progress in the tournament when he scored his maiden win, after four straight losses against higher ranked Mark King of England 4-3 (82-7, 60-17, 78-9, 25-104, 56-57, 45-76, 76-4) to enter the second round.
However, Walden who had beaten Mark Allen 10-7 in the final of the International Championship in China last November to pocket pound sterling 125,000, proved too wily and skilful a customer for the top Indian player who fought well from 0-3 to 2-3 before losing.
Not to be disheartened, Mehta stayed alive for the last 16 berth by clinching the fourth frame 73-18 with the help of small breaks - 34 being the highest.
With the pendulum having swung the Indian's way, Mehta played aggressively to clinch the fifth frame 76-0 with the help of a foul by his rival on the brown and small breaks of 46 and 26 while his rival's three visits to the table did not yield a single point.
The Englishman will meet China's Tian Pengfei, world no. 90, tomorrow for a place in the last eight. The latter outclassed Mark Joyce of England 4-1 in an earlier second round match.
