Hello @okieshan1. This must be a frustrating choice facing you. I did some research because I was curious myself and was able to find an article from the NIH website that you may find interesting, https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4726476/. In particular, there are a few passages from the abstract of this study that you may find relevant:
"Given the limitations of current testing methods, the widespread screening of patients for metal allergies before TKA is not warranted."
"Anecdotal reports suggest that, if metal hypersensitivity is suspected and nonsurgical measures have failed, then revision to components fabricated of titanium alloy or zirconium coating can be successful in relieving symptoms. Revision should be considered as a last resort, however, and patients should be informed that no evidence-based medicine is available to guide the management of these conditions, particularly for decisions regarding revision."
@okieshan1, I see that the above mentioned alternatives also showed mildly reactive in your test results, but it does suggest that there are alternative metals and coatings out there for replacements. If you don't mind sharing, did your surgeon discuss with you any other options for knees? I would have to imagine that they have more access to resources regarding devices.