A monolithic foam sleeve comprises titanium or titanium alloy foam having a porosity of 50 to 85%. The sleeve has possess a proximal end, a distal end, an interior wall that defines an interior channel and extends from the proximal end to the distal end. A terraced outer surface that tapers such that said sleeve is widest at the distal end and most narrow at the proximal end. The sleeve can be used in an implant component of a knee joint prosthesis.
