The 36-year-old’s ton was crucial as he took Australia’s lead past the 50-run mark on day three after Head had given the hosts the perfect platform.
Starting the day at 166/2, Head continued to assert himself on the English bowlers as he notched up his 12th hundred before adding another 63 runs to get Australia within hundred runs of the English total before being dismissed.
Smith, well supported by Cameron Green, then helped Australia go into the lead and assume a position of strength while notching up milestones of his own.
Australia had secured the series after winning the first three Test matches before England ended their 14-year wait for a Test victory in Australia with a win in Melbourne to gain valuable ICC World Test Championship points.
Ashes schedule:
First Test: Perth Stadium, November 21-22 (Australia won by eight wickets)
Second Test: Gabba, December 4-7 (Australia won by eight wickets)
Third Test: Adelaide Oval, December 17-21 (Australia won by 82 runs)
Fourth Test: MCG, December 26-30 (England won by 4 wickets)
Fifth Test: SCG, January 4-8
