diff --git a/graphene/utils/str_converters.py b/graphene/utils/str_converters.py
index ae8ceff..6fcdfb7 100644
--- a/graphene/utils/str_converters.py
+++ b/graphene/utils/str_converters.py
@@ -1,13 +1,13 @@
 import re
 
 
-# From this response in Stackoverflow
+# Adapted from this response in Stackoverflow
 # http://stackoverflow.com/a/19053800/1072990
 def to_camel_case(snake_str):
     components = snake_str.split('_')
     # We capitalize the first letter of each component except the first one
-    # with the 'title' method and join them together.
-    return components[0] + "".join(x.title() if x else '_' for x in components[1:])
+    # with the 'capitalize' method and join them together.
+    return components[0] + ''.join(x.capitalize() if x else '_' for x in components[1:])
 
 
 # From this response in Stackoverflow

Fields with numbers in names do not capitalize correctly
I noticed that the field with names containing numbers (e.g. `field_i18n`) doesn't capitalize correctly.

For example:
`correct_field` becomes `correctField`, but `field_i18n` becomes `field_I18N` and `t1e2s3t` becomes `t1E2S3T` which is obvious incorrect.

This caused by using `.title` method in `str_converter.py` instead of `.capitalize`. Title method is suitable for use with words, but field names are single word.
diff --git a/graphene/utils/tests/test_str_converters.py b/graphene/utils/tests/test_str_converters.py
index 2ee7d7a..11f7e15 100644
--- a/graphene/utils/tests/test_str_converters.py
+++ b/graphene/utils/tests/test_str_converters.py
@@ -16,6 +16,7 @@ def test_camel_case():
     assert to_camel_case('snakes_on_a_plane') == 'snakesOnAPlane'
     assert to_camel_case('snakes_on_a__plane') == 'snakesOnA_Plane'
     assert to_camel_case('i_phone_hysteria') == 'iPhoneHysteria'
+    assert to_camel_case('field_i18n') == 'fieldI18n'
 
 
 def test_to_const():

pip install -e .[test]
parse_log_pytest
requirements.txt
3.6
pytest --no-header -rA --tb=line --color=no -p no:cacheprovider -W ignore::DeprecationWarning
attrs==22.2.0
certifi==2021.5.30
charset-normalizer==2.0.12
coverage==6.2
coveralls==3.3.1
docopt==0.6.2
fastdiff==0.3.0
-e git+https://github.com/graphql-python/graphene.git@38db32e4f2d57f54a77879f9277ad4408792c881#egg=graphene
graphql-core==2.3.2
graphql-relay==0.4.5
idna==3.10
importlib-metadata==4.8.3
iniconfig==1.1.1
iso8601==1.1.0
mock==5.2.0
packaging==21.3
pluggy==1.0.0
promise==2.3
py==1.11.0
py-cpuinfo==9.0.0
pyparsing==3.1.4
pytest==7.0.1
pytest-benchmark==3.4.1
pytest-cov==4.0.0
pytest-mock==3.6.1
pytz==2025.2
requests==2.27.1
Rx==1.6.3
six==1.17.0
snapshottest==0.6.0
termcolor==1.1.0
tomli==1.2.3
typing_extensions==4.1.1
urllib3==1.26.20
wasmer==1.1.0
wasmer-compiler-cranelift==1.1.0
zipp==3.6.0

name: graphene
channels:
  - defaults
  - https://repo.anaconda.com/pkgs/main
  - https://repo.anaconda.com/pkgs/r
  - conda-forge
dependencies:
  - _libgcc_mutex=0.1=main
  - _openmp_mutex=5.1=1_gnu
  - ca-certificates=2025.2.25=h06a4308_0
  - certifi=2021.5.30=py36h06a4308_0
  - ld_impl_linux-64=2.40=h12ee557_0
  - libffi=3.3=he6710b0_2
  - libgcc-ng=11.2.0=h1234567_1
  - libgomp=11.2.0=h1234567_1
  - libstdcxx-ng=11.2.0=h1234567_1
  - ncurses=6.4=h6a678d5_0
  - openssl=1.1.1w=h7f8727e_0
  - pip=21.2.2=py36h06a4308_0
  - python=3.6.13=h12debd9_1
  - readline=8.2=h5eee18b_0
  - setuptools=58.0.4=py36h06a4308_0
  - sqlite=3.45.3=h5eee18b_0
  - tk=8.6.14=h39e8969_0
  - wheel=0.37.1=pyhd3eb1b0_0
  - xz=5.6.4=h5eee18b_1
  - zlib=1.2.13=h5eee18b_1
  - pip:
      - attrs==22.2.0
      - charset-normalizer==2.0.12
      - coverage==6.2
      - coveralls==3.3.1
      - docopt==0.6.2
      - fastdiff==0.3.0
      - graphql-core==2.3.2
      - graphql-relay==0.4.5
      - idna==3.10
      - importlib-metadata==4.8.3
      - iniconfig==1.1.1
      - iso8601==1.1.0
      - mock==5.2.0
      - packaging==21.3
      - pluggy==1.0.0
      - promise==2.3
      - py==1.11.0
      - py-cpuinfo==9.0.0
      - pyparsing==3.1.4
      - pytest==7.0.1
      - pytest-benchmark==3.4.1
      - pytest-cov==4.0.0
      - pytest-mock==3.6.1
      - pytz==2025.2
      - requests==2.27.1
      - rx==1.6.3
      - six==1.17.0
      - snapshottest==0.6.0
      - termcolor==1.1.0
      - tomli==1.2.3
      - typing-extensions==4.1.1
      - urllib3==1.26.20
      - wasmer==1.1.0
      - wasmer-compiler-cranelift==1.1.0
      - zipp==3.6.0
prefix: /opt/conda/envs/graphene

graphene/utils/tests/test_str_converters.py::test_camel_case
graphene/utils/tests/test_str_converters.py::test_snake_case graphene/utils/tests/test_str_converters.py::test_to_const
graphene/utils/str_converters.py
graphene/utils/str_converters.py