On average, a total titanium hip system replacement weighs between 1 and 2 pounds, according to HipReplacement.com. The parts for a total system replacement include the stem, the head, the shell and the liner.
The hip joint includes the femoral head and the femur, which fit into the socket of the pelvis. The head of the femur rotates inside the acetabulum. In an artificial hip, the femoral stem is inserted into the femur, and the femoral head is fitted inside an artificial acetabular shell, which connects the leg to the hip and allows for movement, reports HipReplacement.com.
The most common hip implant materials are titanium or cobalt-chrome alloy, states Joint Preservation Institute. Hip implants can wear out over time dependant upon lifestyle, activity levels, weight and other conditions.