Noun ti has 3 senses

• ti(n = noun.substance) atomic number 22, titanium - a light strong grey lustrous corrosion-resistant metallic element used in strong lightweight alloys (as for airplane parts); the main sources are rutile and ilmenite; Array
is a kind of metal, metallic element

• ti(n = noun.plant) cordyline terminalis - shrub with terminal tufts of elongated leaves used locally for thatching and clothing; thick sweet roots are used as food; tropical southeastern Asia, Australia and Hawaii; Array
is a member of cordyline, genus cordyline
is a kind of bush, shrub

• ti(n = noun.communication) si, te - the syllable naming the seventh (subtonic) note of any musical scale in solmization; Array
is a kind of solfa syllable