Walden, who had not won a match at the Crucible before this year, won each of the three frames he needed in the evening session to halt any hope of a White comeback in its tracks.
It wasn’t all plain-sailing; indeed White should have won the first frame of the evening after Walden's streak broke down on 36 with an easy missed red. But a critical miss on the blue from White with the frame at his mercy let Walden back in and although both twitched on chances to win on the black, Walden pouched the decisive pot.
A break of 50 after one of many missed reds to the middle from White proved enough to win the next and White then let a -point lead slip as Walden produced a nerveless clearance under pressure to advance to the semi-final.
SECOND SESSION REPORT
Ricky Walden held on to his four-frame advantage with a 10-6 lead, despite Michael White offering more of a showing in the second session of their World Championship quarter-final.
Despite Welsh Crucible debutant White needing something fast to cut down the four-frame deficit from the first session, Walden utilised crisp, measured building of medium-sized breaks to go 7-2 ahead before a run to 63 extended the gap to six.
A missed black prevented more of the same from Walden in the 11th and White finally looked like the man who sent Mark Williams and Dechawat Poomjaeng home as he cleared with an even 100.
Walden responded well, going four better with a 104 clearance to stay six ahead heading into the mid-session interval, but that only delayed White’s fight-back slightly.
A White break of 75 would have been three centuries in as many frames from either man, had he not fouled on the pink, and 62 in the next frame was enough for 9-5 despite the Englishman’s quest for snookers.
Despite Walden breaking 51 in the 15th frame, White fought back after a missed black and completed the steal on a tense final colours trail but Walden, perhaps crucially, made sure the final session begins with a four-frame chasm rather than a far more competitive difference of two.
FIRST SESSION REPORT
Michael White paid the price for failing to score as Ricky Walden opened up a 6-2 lead in the World Championship quarter-finals in Sheffield.
Welsh qualifier White, 21, made a highest break of only 40 as Walden enjoyed knocks of 93, 58, 59 and a closing break of 113 in opening up his four-frame advantage.
White was under pressure from the outset in his first appearance in the last eight of a ranking tournament, and it seemed to show with Walden - winner of the Wuxi Classic - dominating for large swathes of the afternoon.
They continue the match at 2:30pm on Wednesday with the final session to be played tomorrow evening.
The first man to 13 frames reaches the last four and a match against Ding Junhui or Barry Hawkins.