The present invention generally provides improved medical devices, systems, and methods, particularly for treating one or both lungs of a patient with an implant, such as a coil, having a strength tuned to a patient's tissue treatment region. More particularly, embodiments of the present invention include implant assemblies and systems for treating a lung of a patient with chronic obstructive pulmonary disease. The implant assemblies may comprise an elongate body comprising an alloy that may be characterized by its austenite final tuning. The implant may include multiple portions that may be of different austenite final tunings.
