Centurion: South African captain Graeme Smith looked ahead to a world Test championship showdown with Australia after his side crushed Bangladesh by an innings and 48 runs on the third day of the second and final Test at Centurion Park Friday.

South Africa, who regained second position on the world championship table with their 2-0 series win - their eighth win in nine series, with one drawn - depart for Australia on December 6 for a three-Test series against the world champions.

Smith said he would embark on his second tour of Australia as captain feeling more settled than when South Africa were beaten 2-0 in 2005/06, backed by a team of experienced, accomplished players.

Bangladesh were blown away for 131 in their second innings with their batsmen unable to deal with the pace and bounce of South Africa's fast bowlers. Bangladesh contributed to their own downfall with three run-outs, two from direct hits from the deep as the batsmen attempted second runs.

It was a disappointing ending for Bangladesh, who briefly held the upper hand on the second day when they reduced South Africa to 134 for five after making 250 in their first innings.

Captain Mohammad Ashraful said it had been one of the toughest series he had been involved in but he felt there had been some encouragement for Bangladesh in each of the matches they had played.

He also felt Bangladesh bowled exceptionally well apart from an hour on the second afternoon when Ashwell Prince and Mark Boucher turned the match decisively in the home side's favour during a record sixth wicket partnership of 271.

Left-arm spinner Shakib Al Hasan took three wickets in four balls to spark a collapse in which South Africa lost their last five wickets for 24 runs. Shakib finished with six for 99, his second haul of five wickets or more in two innings during the series.