Iodine at the common temperature has no action upon this metal.
Bromine, when the surface of this substance is perfectly dry, has no more action upon it than iodine; but if it have a slight coating of moisture, as is formed by merely condensing on it the vapor of the breath, the colored films are formed without difficulty by the vapors of bromine. Their appearance is the same as those of the iodide of silver, viz. gold, deep gold, blue, white, yellow, orange, red, &c.
Chlorine with Titanium and Copper.
Titanium has a stronger affinity than it has for either of the preceding vapors. The combination takes place when the metallic surface is either dry or moist.
Copper—much reddened.
Titanium—not affected.
Copper—passed through several of the spectral orders of red and green
until it arrived at almost its last changes of colors.
Titanium under the same action received a dull film, which viewed obliquely showed red, green, yellow.
Silver, exposed to the same influence as the two former, had yellow in the centre and blue more externally.