I. IntroductionThe problem posed is to select the material and design the next generation of coronary stents, used in the treatment of coronary artery diseases. The final material must be commercially available, have published properties, be a solid cylinder, have a diameter of 8 mm, a length of 15 mm, be biocompatible and meet several engineering constraints. To solve the problem at hand, the researcher first looked at various journals and scholarly publications to see what types of materials are typically used in coronary stents. From this group of materials, the final selection was further refined by examining specific material properties using the online material properties database at www.matweb.com. From this data, the final three candidates were selected. The analysis of each material and the examination of the cost and availability of these materials allowed the researcher to select a final material meeting the given constraints. After all the research was completed, nitinol, or nickel-titanium, was selected as the best material for the next generation of coronary stents.II. AnalysisMaterial Density Elastic modulus Yield strength Yield strength % Commercial availability Biocompatibility316LVM Sandvik Bioline 8.00 g/cc 200 GPa 800 MPa 12% alloy wire International Yes Extremely goodNb-1Zr 8.59 g/cc 68.9 GPa 241 MPa unpublished Vegas FastnerHigh-N Bar Steel 8.00 g/cc 200 GPa 1100 MPa 15% Sandvik Materials TechnologyNitinol 6.45 g/cc 28 GPa 850 MPa 15.50% Metalmen Sales Yes Extremely goodTantalum 16.65 g/cc cc 186 GPa 450 MPa unpublished MarkeTech International ......h an oxide layer caused by soaking in nitric acid resists interaction with the environment in which it is placed. All these factors make Nitinol an excellent choice for making a stent.V. SynthesisNitinol is a mixture of 50% Nickel and 50% Titanium. Once made, it must go through several stages to take its shape and become biocompatible. For Nitinol to achieve its shape memory characteristics, it must be heat treated. Before the start of heat treatment, the wire is shaped into the desired shape, and after heat treatment, the metal becomes stronger and “remembers” its shape. Finally, the sample must be soaked in an acid to create the oxide layer, which prevents it from interacting with its environment. Nitinol is also easy to machine, which, thanks to its shape memory and oxide coating, makes it an excellent choice for use in medical devices..