In contrast to α+β alloys, β alloys do not transform martensitically upon quenching
to room temperature, resulting in a metastable β phase. The α phase can be
precipitated from the metastable β phase as very fine, undeformable particles
(platelets) with a high volume fraction, see Sect. 2.8.2. Therefore, the main characteristic
of β alloys is that they can be hardened to much higher yield stress levels
than α+β alloys.