In another move, they acquired Washington Wizards guard Eric Maynor, the New Orleans Pelicans 2015 second-round pick, and the Denver Nuggets 2016 second-round pick in a three-team trade.
Meanwhile, the Sixers traded a conditional second-round pick to the Los Angeles Clippers for center Byron Mullens and a 2018 second-round pick.
The Sixers announced the Hawes and Turner-Allen trades and the three-team deal with Washington and Denver.
General manager Sam Hinkie would not comment Thursday at the Sixers practice facility at Philadelphia College of Osteopathic Medicine. He will hold a news conference on Friday.
"Sam is working his tail off to do what we told the marketplace and the owners we would do," Sixers coach Brett Brown said after Thursday's practice. "It's to build a program that is solid. To build a program that has a chance to compete for things that we are all here to compete for.
"That process takes so much time and patience and precise decisions. . . . He's doing his job."
Hawes found out that he would be traded Thursday morning.
"My agent gave me a call," Hawes said. "The limbo is probably the toughest thing about it. You hear your name so much floated here, floated there. It's nice to kind of have a result."
Hawes said that he expected to get traded and believes the move was best for both parties. The 25-year-old is also excited to go to the Cavaliers, who are on a six-game winning streak.
"I think they have been playing really well recently," he said. "Obviously, you can attest to that the other night [Tuesday's 114-85 win over the Sixers]. So it's good to be a part of that, make the most out of the stretch run."
Hawes has an expiring contract and will be a free agent this summer. The 7-foot-1, 245-pounder is averaging 13 points and 8.5 rebounds this season. But he has struggled as of late, averaging six points and shooting 10 for 40 in his last four games.
The seven-year veteran was the 10th overall pick in the 2007 NBA draft by the Sacramento Kings after his freshman season at Washington University. After three seasons, he and Andres Nocioni were traded to the Sixers for center Samuel Dalembert in June 2010.
Turner was spotted leaving the practice facility with a disappointed look on his face shortly after the trade deadline. Less than two hours earlier, the swingman was one of the last players on the Sixers practice court. He was not made available to the media after practice and could not be reached for comment Thursday night.
Like the Hawes move, trading Turner wasn't a surprise.
The second overall pick of the 2010 draft is scheduled to become a restricted free agent this summer.
The move enabled the Pacers to get younger and more athletic and to dump Granger's $14 million expiring contract. The Sixers, in return, got a future draft pick.
Turner led the Sixers with averages of 17.4 points, 6 rebounds, and 3.7 assists. Allen averaged 5.8 points and 3.5 rebounds as the backup center. The Temple product, who has an expiring contract, was a Sixers second-round pick in 2011.
Clark was the 14th overall pick by the Phoenix Suns in 2009. The 26-year-old has also played for the Orlando Magic and Los Angeles Lakers. He was in the final year of his contract.
The 6-10, fifth-year veteran out of Louisville was averaging 5.2 points and 2.8 rebounds this season, with 17 starts. However, he had played in only four of the Cavs' last 10 games. Against the Sixers on Tuesday, Clark didn't attempt a shot or score a point and had one rebound in 6 minutes, 53 seconds.
Sims is a 6-10, 248-pound undrafted, second-year player out of Georgetown. The Baltimore native is in the final season of his contract. He had seven points and eight rebounds against the Sixers on Tuesday night. Sims averaged 2.2 points, 2.8 rebounds, and 8.4 minutes in 20 appearances - all off the bench - with the Cavs this season.
Maynor played in 23 games off the bench this season with the Wizards. He averaged 2.3 points and 1.7 assists. The fifth-year veteran was a first-round pick of the Utah Jazz in 2006. He has also played for the Oklahoma City Thunder and the Portland Trail Blazers.
Maynor, who is in his final year of his deal, has a player option next season for $2.1 million.
Mullens, a 7-foot, 275-pound center, averaged 2.2 points and 1.2 rebounds in 27 appearances - all off the bench - for the Clippers this season. He has a player option for $1 million next season.