Abstract
The properties of Ti-10V-2Fe-3Al which is a precipitation hardnable alloy depends on heat treatment condition. The relationship between hardness and electrical resistivity changes was studied at various solution and aging temperatures. The changes of these properties with aging was related to each other because of α phase precipitation. Also the activation energy obtained by electrical resistivity changes for α phase precipitation on aging was found to be nearly constant at different solution temperatures above β transus or below.