Despite scoring a late try in his final game for Wales, Shane Williams was handed a losing send-off in Cardiff as Australia prevailed 24-18 on Saturday.
The result made it four wins in a row for Australia over Wales, as they backed up their victory when the teams last met in the RWC bronze final, and extended the hosts' poor record against the Tri-Nations to just one success in sixteen Tests.
But the 34-year-old Williams, to the delight of a crowd of more than 61,000, had the last word when, with his final act in a Wales jersey, he scored a typically jinking try in the corner just before full-time to extend his record to 58 tries.
The clash, played under a closed roof, changed when, with Wales 6-3 up early in the second half, home full-back Leigh Halfpenny was sent to the sin-bin and Australia scored 21 unanswered points while he was off the field.
Wales took a sixth minute lead when Rhys Priestland kicked a 40 metre penalty.
Shane Williams had to wait thirteen minutes to get his first touch but, soon afterwards, he came across from the left wing to the right to help keep an attack alive. But a promising move ended when centre Scott Williams dropped the ball short of the line.
Australia's James O'Connor, playing his first Test at fly-half, then missed a straightforward penalty chance that would have levelled the game before Australia went close to scoring a try on the half hour.
After a surging run by full-back Adam Ashley-Cooper, Berrick Barnes's clever cross kick was gathered close to Wales's line by Wallaby right wing Lachie Turner.
But Shane Williams, once again showing his defensive worth, just did enough to force Turner into touch before he grounded the ball. Although it needed several minutes' study by video referee Geoff Warren before Australia were denied a try.
Priestland and O'Connor then exchanged penalties, both awarded for offside, to leave Wales three points in front at half-time.
Australia emerged for the second period without openside flanker David Pocock, replaced by Radike Samo, and soon went close after a fine handling move saw O'Connor launch a counter-attack involving Barnes and Ashley-Cooper.
But after Barnes, involved for a second time, kicked ahead, O'Connor was tackled without the ball in sight of the line by Halfpenny and Jonathan Kaplan sent him to the sin-bin.
It was an expensive error, with Australia scrum-half Will Genia forcing his way over for a close range try which O'Connor converted. O'Connor then missed a simple penalty, the ball hitting the post, minutes later but it hardly mattered.
It was O'Connor's excellent cut-out pass that sent Turner in for a try at the corner and he then made no mistake with the tricky conversion.
Wales were still a man down when Samo's pass found Barnes for Australia's third try.
The home side did staunch the flow of Australia points with their first try in the 66th minute after Priestland followed up after good work out wide by replacement forward Ryan Jones.
But Priestland's conversion attempt hit the post and Australia were still 24-11 in front before Shane Williams scored the try the crowd wanted. An ideal way for him to cap his Test career.
The scorers:
For Wales:
Tries: Priestland, Williams
Con: Biggar
Pen: Priestland 2
For Australia:
Tries: Genia, Turner, Barnes
Con: O'Connor
Pen: O'Connor 3
Wales: 15 Leigh Halfpenny, 14 George North, 13 Scott Williams, 12 Jamie Roberts, 11 Shane Williams, 10 Rhys Priestland, 9 Lloyd Williams, 8 Toby Faletau, 7 Sam Warburton (c), 6 Dan Lydiate, 5 Ian Evans, 4 Bradley Davies, 3 Scott Andrews, 2 Huw Bennett, 1 Gethin Jenkins.
Replacements: 16 Matthew Rees, 17 Ryan Bevington, 18 Ryan Jones, 19 Justin Tipuric, 20 Tavis Knoyle, 21 Dan Biggar, 22 Alex Cuthbert.
Australia: 15 Adam Ashley-Cooper, 14 Lachie Turner, 13 Anthony Fainga'a, 12 Berrick Barnes, 11 Digby Ioane, 10 James O'Connor, 9 Will Genia, 8 Ben McCalman, 7 David Pocock, 6 Scott Higginbotham, 5 Rob Simmons, 4 James Horwill, 3 Salesi Ma'afu, 2 Tatafu Polota-Nau, 1 James Slipper.
Replacements: 16 Stephen Moore, 17 Ben Alexander, 18 Nathan Sharpe, 19 Radike Samo, 20 Ben Lucas, 21 Ben Tapuai, 22 Nick Phipps.
Referee: Jonathan Kaplan
Assistant referees: Dave Pearson, Jérôme Garces
TMO: Geoff Warren
As expected, running rugby was the order of the day but in the end the Wallabies were more clinical in the execution of their moves and were rewarded with eight tries against the men in black and white hoops.
Les Bleus were a completely different side to the one that had fallen to the 2011 hosts and also Tonga during the Pool stages. And they pushed the Kiwis right up until the death in a highly-charged 80 minutes at Eden Park on Sunday.
Both sides crossed the whitewash twice, with Wales bagging a consolation second try on full-time to end the match -- but not the tournament -- on a high note.
The hosts -- the only unbeaten team left in the tournament -- will face France at the same venue in seven days in a repeat of the 1987 RWC final.
Did they deserve it for the way they played against fourteen men? No. But that is rugby as Wales bow out following what was a superb tournament.
The All Blacks were far from their best but teams seldom are in knockout rugby. What may be a concern to them though was the loss of Colin Slade to injury. Dan Carter's fly-half replacement left the field during the first stanza with a leg injury, being replaced by third-choice Aaron Cruden.
The Wallabies scored the only try of the game but needed a late James O'Connor penalty to scrape past the dominant Springboks.
England were second best as they could not make it three finals in a row, while les Bleus deservedly march on to face Wales next week.
In what was a breathless encounter in the New Zealand capital, the Welsh outscored Ireland by three tries to one to seal a semi-final spot on rugby's biggest stage for the first time since 1987.
There was little to separate the two nations at the break with three Ronan O'Gara penalties edging Mirco Bergamasco's two. But after their rest, the Irish stepped up through the gears in Dunedin.
Wales secured a four-try bonus point in the first half of a one-sided affair and will now face either Australia or Ireland in Wellington next Saturday.
Wing Zac Guildford grabbed four tries as Canada were unable able to cope with the pace at which New Zealand launched attack after attack.
Any hope Scotland may have had of sneaking into the last eight through the back door, was shut in their face following the Pumas' three tries to one victory in Pool B.
As it was, Scotland are looking at returning from New Zealand early as they await the result of Argentina's fixture against Georgia on Sunday. The Scots need the Lelos to cause an upset of Tongan proportions in Palmerston North.
Russia ran in three tries -- through Vladimir Ostroushko, Denis Simplikevich and Konstantin Rachkov -- but the Golds hit double figures.
Samoa knew going in that it would be a tough ask to make it into the quarter-finals, but no one ever doubted they would fight until the final whistle.
It was a well-deserved victory by the Georgians, who stay on to play Argentina on Sunday with a win under their belt.