I was scheduled for knee replacement but insisted upon testing for bone cement and metal allergies based on my allergic testing history to over a dozen elements. Medicare doesn't pay for testing for this pre-surgery metal allergy testing so I had to pay $600 and this blood test was shipped off to a lab in Chicago.
Results- positive allergies to 5 metals, but not titanium. However traces of other metals are in titanium. Surprisingly I wasn't allergic to bone cement although I'm currently allergic to acrylics used in many adhesives. My surgery was canceled because the surgeon said wear and tear on the implant caused sloughing of metals and the trace metals I was allergic to would enter my body.

Another topic- how to pull heavy metals out of your body at home.
Chelation can pull metals from your blood. This can be done faster by having your blood filtered by doctors. Heavy metals have been tied to Parkinson's, Alzheimer's, and Grover's Disease, GD ( a form of eczema). i have GD and GD has no cure, however I learned from blogging on this site about home chelation using blended cilantro, about 1/2 bunch daily, to pull out heavy metals. I did this for about 6 months. After one month it put my GD into remission. I was clear for about 3 years and it mildly started up again and I resumed the smoothies for a few weeks and it's controlled again. If you have metal implants with high levels of metals in your blood get medical chelation but levels are only at slightly higher levels of metals in you blood, in my layman's mind this seems like a good way to prevent higher metal build ups.
There are other herbs like oregano which can also be used, Google this topic. Those of us that experimented with fresh or fresh frozen cilantro to put our GD into remission found it helped about 50% of us, few that used cilantro oil or capsules found relief. So if trying to self-chelate your blood I recommend using fresh or fresh frozen blended with about 1/2 cup of water and chug it down like a tonic. If you put it in your morning smoothy it was ruin the taste of your smoothy.