Captain America's shield

Captain America uses his Shield as a primary defensive and offensive piece of equipment for battle. His shield is made out of Adamantium and Vibranium.

1970s TV Movies
In the 1970s Captain America TV movies, Steve Rogers was given a transparent Plexiglas shield painted with concentric stripes (red and clear transparent) and a central star. The shield was designed to act as the windscreen for his motorcycle, but could be detached and used in its traditional offensive / defensive role when Rogers goes on foot. Furthermore, the shield can apparently return to Rogers in a smooth arc when thrown without needing to be ricocheted and with enough force to knock a man down in the return path.

Ultimate Avengers
In the animated movie Ultimate Avengers, based partly on The Ultimates but with several changes, Captain America uses a shield containing vibranium. In the Ultimate universe, Captain America used his triangular shield throughout World War II, only gaining the disc-shaped vibranium-bearing shield after he awoke in the present day. The composition of the triangular shield remains unrevealed. It did prove to be bulletproof against the bullets of World War II German soldiers, but was dented by a superhuman alien's punch.

Captain America: The First Avenger
Steve Rogers uses an ornamental version of the triangular shield during a musical tour promoting War Bonds, which he then uses in his first field mission. Rogers later acquires the familiar circular shield from Howard Stark. Rogers chooses the unadorned vibranium shield (actually a prototype) over several more advanced models based on the triangular shield. The Vibranium prototype shield proved to be the perfect weapon for Steve. As Captan America he accomplished amazing feats with it. Aside from bashing HYDRA soldiers and blocking incoming attacks, Rogers was able to throw it with near perfect aim and have it ricochet back to him.

Iron Man
Captain America’s shield appears 1 hr 25 min 23 sec into the movie at the point where Pepper Potts comes in on Tony trying to get out of his damaged armor; the shield is visible in the distance below Tony's right arm. According to a tie-in comic, Tony's father Howard Stark created the shield. Tony subsequently used the alloy of a prototype to create his armor.

The Incredible Hulk
A deleted scene features the shield covered by snow.

Iron Man 2
Phil Coulson finds Captain America's shield in Tony's house.