how is the title iii—joint commission on the coinage related to this act?
It was tasked to report on the implementation of the act, and make recommendations from time to time to the president, the Treasury Secretary, and Congress.
Coinage Act of 1965
The Joint Commission was tasked to report on the implementation of the Coinage Act of 1965, and make recommendations from time to time to the president, the Treasury Secretary, and Congress. 
when was silver taken out of us coins 1965 when was this act enacted? July 23, 1965 was there a shortage of coin? Yes. who minted the coin? United States Bureau of the Mint
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Coinage Act of 1965 [SEP] Title III—Joint Commission on the Coinage (sections 301 to 304)
The matters within its remit were to include technological advances, the need of the economy for coins, whether the U.S. should continue to maintain the price of silver, and whether the silver dollar should again be minted. Section 304 appropriated such money as might be needed to carry out the Coinage Act.