Safest thing is to ship to my Mother in Law and in her name, using my account. Above is her complete address and CODEX is Portuguese version for ZIP CODE.
Best thing that you fill the contents as ANNIVERSARY GIFT - 2 MEDALLIONS.
In the package itself, in a corner, you may want to put PRENDA DE ANOS - 2 MEDALHÕES.
Do Not mention Titanium. Europe is so much complicated...
Best regards,
Antonio