I have been seeing a dermotologist, we ran all the tests,,, it's not shingles or anything else an initial culture and bloodwork could find.
Judging by the medical literature, allergy to titanium must be extremely rare. It is likely that the skin lesions are unrelated to your gallbladder surgery. If by upper torso you mean your thorax or chest and especially if the lesions do not cross the midline you may have a herpes infection called herpes zoster or “shingles”. The dates given indicate that you have had these lesions for over 2 months. Be they herpes zoster or not, you should definitely consult with a dermatologist and soon.
Good luck.