This fact is from Orthodontic Wires & Brackets in Orthodontics. It is a commonly tested concept in NEET MDS examinations. Understanding this fact is crucial for answering MCQs correctly.
NiTi = most flexible lowest stiffness for alignment phase
Stainless steel = highest stiffness for finishing detailing
TMA = beta titanium = intermediate properties
Ideal arch wire sequence: NiTi then TMA then SS
Roth prescription = 0 degree torque
Pre-adjusted edgewise = straight wire.