(This is a resend with a correction. It seems the original message did not get through to vortex. In the original message and earlier messages I used the term _stiffness_ instead of the more accurate term _modulus of elasticity_.Stiffness depends on the shape of the material, but the modulus of elasticity is an intensive property)
Jouni equates the modulus of elasticity of the spring by the cold bath with the shape changing behaviour of nitinol. However, I think the modulus of elasticity of a wire is a property which is independent of the wire's shape. Consider two short lengths of _straight_ wire. One is made from copper and one is made from nitinol. The force required to bend each wire is a measure of each wire's modulus of elasticity. Warming or cooling the copper wire will not cause the cooper wire to bend but it will alter its modulus of elasticity. It may also be possible to forge a straight piece of nitinol wire such that the nitinol wire's modulus of elasticity can be changed by warming or cooling without causing it to change shape. Harry
