According to Wikipedia (slightly edited):
During a Test match between Australia and England, at Perth in December 1979, Dennis Lillee went to the crease with an aluminium bat manufactured by a company owned by a friend of his. There were no rules against using such a bat, but trouble began when Lillee hit a ball that went for three runs. Australian captain Greg Chappell thought that the ball should have gone for a four, and instructed Rodney Hogg to deliver a conventional wooden bat to Lillee. At the same time, England captain Mike Brearley complained to the umpires that using such a bat was against the spirit of the game and that it was damaging the ball.
Lillee refused to change the bat. Brearley, Lillee, and the umpires held an animated discussion for almost ten minutes, before Chappell insisted that Lillee should change bats. In a fit of pique, Lillee threw "the offending lump of metal fully 40 yards towards the pavilion", and grudgingly took the wooden bat. He was not disciplined by the ACB for this incident. After the game, sales of the bat skyrocketed for a few months, before the laws of the game were amended, specifying that bats had to be made from wood.
© Haydn Thompson 2020