Use

• Wooden bats are the only bats sanctioned by Major League Baseball. Bats have to be made of one piece of wood and be no more than 42 inches in length, according to Mlb.com. Aluminum bats are used in many children's, high school and college leagues.
  
  

Control

• Aluminum bats are often lighter in weight, which means that a batter can have more control over the bat when she swings. Batters often have to make adjustments to their swing earlier if they use a wooden bat, according to the Argonne National Library.
  
  

Hitting Potential

• Batters can hit a baseball farther using a wooden bat because the bat's weight is centered around the barrel, and aluminum bats have more recoil, according to the Argonne National Library. Aluminum bats allow hitters to generate faster bat speeds because their weight is distributed throughout the bat, according to Alan M. Nathan of the University of Illinois-Urbana Champaign.
  
  

Swing Potential

• Aluminum bats often allow batters to hit inside pitches more easily because their "sweet spot," or the place on the bat where the most speed is generated and energy is shifted to the baseball, is closer to the handle, according to an article by Daniel A. Russell, Associate Professor of Applied Physics at Kettering University.
  
  

Durability

• Aluminum bats are less likely to break than wooden bats because they are made of stronger materials, according to Daniel A. Russell. Wooden bats, especially those made with ash, often break in the middle.