Effect of three aging conditions, in dark, in light, and in light synchronously with load (with load), on the mechanical properties of Te2As3Se5 (TAS) glass have been investigated through a series of tensile strength (σ) measurements. Relief of σ in three aging conditions could be related to structural relaxation. And the relaxation time almost 1.5 months is well in agreement with our previous results of calorimetric and mechanical properties. Compared with dark condition, photoinduced effect makes the relief of σ more obvious, but load effect makes the σ to be stronger in direction of testing. Thus, we suggest that, to keep fibers with good σ, they should be stored in dark and with load.