Having repaired these once before, I wasn’t too surprised when this happened:

Evidently the “titanium” has fatigued, because the repair lasted barely nine months.
Rather than try to fix them again, I sent my new prescriptions halfway around the planet and, a bit under two weeks later, had three glasses: normal, computer, and sun. This time, I went with 38 mm tall lenses, a heavier nose bridge, and traditional aviator sunglasses.
For the record, the regular prescription was:
Tweaking that by +0.75 diopter on the sphere puts my far point focus on the monitors across the desk and backing -0.75 diopter from the adder keeps the same near-point reading correction:

They’re all no-line progressive bifocals made from 1.57 high-index plastic with anti-reflection coating, for a grand total of $135 delivered.
That being only slightly more than the estimated cost of fixing one broken Silhouette frame temple, Mary will try living in the future, too.
I too had “unbreakable” titanium eyeglasses which “broke”, just like yours. My last glasses also came from China.
That single-wire bridge looked like trouble, right from the start, and I wasn’t disappointed. [sigh]
The other pairs had thicker bars, rather than a wire, and are still going strong. Now I know better!