ðə θˈɪknəs ʌv ðɪs kæn biː ɪŋkɹˈiːst baɪ ˈænədˌaɪzɪŋ, ɐ pɹˈɑːsɛs wˌɪtʃ ˈɔːlsoʊ ɹɪzˈʌlts ɪn ɐ dɪstˈɪŋktɪv kˌʌlɚɹˈeɪʃən ʌvðə mətˈɪɹiəl.
The thickness of this can be increased by anodizing, a process which also results in a distinctive colouration of the material.